Tanning is based on the effect of ultraviolet rays on the skin. There are three types of such rays in total. Those called “C” practically do not reach the earth’s surface, so they cannot seriously affect our skin. But “B” rays allow you to get the desired golden shade very quickly, but in a harmful way. The safest tan is considered to be the one obtained by exposing the skin to rays “A”. True, for a strong effect in this case it takes considerable time. But the result is worth it: this tan is safe and lasts a very long time.
Why does the skin darken?
Special cells in the human body are responsible for changing skin tone, as well as its intensity. They contain the pigment melanin, hence the name melanocytes. By causing the skin to darken, they protect the body from the harmful effects of solar radiation. And the more intense the ultraviolet rays, the more pigment the cells produce. An interesting feature of these cells is that they can not only darken, but also lighten (to the chagrin of sunbathers) to their original state. The amount of melanin in the skin is genetically determined; under normal conditions it is maintained at the same level.
Tan intensity
It is known that long-term use of certain medications can weaken the body's protective functions, including the skin's ability to produce melanin. Therefore, some people are prohibited from sunbathing. The same applies to pathologies in which the skin contains too little pigment to effectively withstand the environment. No matter how much such people lie on the beach, they are not “taken” by the tan; dangerous ultraviolet rays freely pass under the skin and cause harm to the body.
The most important factor for quality tanning is the latitude of the area plays a very important role in this matter. This is why people living in hot areas of the Earth have historically had darker skin tones. But the height of the sun is influenced not only by geographical location. The time of day and time of year are also important here. In particular, if we are talking about a temperate climate, where the change of seasons is especially pronounced.
Another important factor relates to the atmosphere itself. The cleaner and more transparent it is, the more rays reach the earth's surface and are reflected from it. Altitude also affects tanning: one day in the mountains will give a greater effect than a week on hot beaches. Among the snow-capped peaks, the intensity of the sun's rays is so high that climbers have to use several layers of protection, special glasses and creams. But even such products do not relieve them of a bright tan. And all this despite the cold that reigns among the snow.
Is it possible to tan through glass?
Even in the cold season, when you can no longer lie on the beach, the sun still shines brightly and welcomingly. Often, when its rays flood our apartments, the thought arises: “How great it would be to sunbathe right here!” Some people, on the contrary, are afraid of their skin reacting too strongly to ultraviolet radiation, so even in transport they try not to sit on the sunny side. The question of whether it is possible to tan through glass worries many. Moreover, in such cases people note redness, characteristic of a newly acquired tan.
In fact, most people don't have to worry about getting tanned through window glass. It, of course, transmits ultraviolet light, but this is only the first type of sunlight. As mentioned above, such radiation is completely harmless to the skin. Rays “A”, and even those scattered by glass, do not have a strong enough impact to trigger the process of melanin production. You should only hope for some effect if a person has already received a tan naturally, but it has gradually begun to fade. Then even weak rays will be able to activate the pigment already contained in the skin, causing some darkening.
In any case, there is no way to get a chocolate southern shade this way. The maximum you should expect is a slight darkening of the skin. Don't mistake heat redness for the first sign of tanning. It will most likely go away in a few minutes. After all, if we apply a heating pad to our cheek for a while, we will also see a red spot later. But no one will claim that a heating pad causes a tan. It’s another matter if you replace ordinary windows with plexiglass. Then you will be able to accept the sunny year.
Do I need to defend myself?
Only those people who are predisposed to the appearance of tanning through glass need to worry about whether they can get tanned through glass. In this case, anything can provoke them. It is recommended to use weak protective creams. Even a regular daytime one will do, since they usually also contain a UV filter. UV protection products are applied mainly to the face and neck - places where age spots usually appear.
Also, the human body has developed natural defenses in addition to melanin. When exposed to the sun for a long time, the skin sweats, which protects it from the penetration of ultraviolet radiation. The above allows you to get rid of concerns about whether you can get tanned through glass in an apartment or car. Moreover, in small quantities they are useful and even necessary for humans. Therefore, you should not protect yourself from them too actively, especially in the autumn season.
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Many people believe that it is impossible to tan through glass and the question is: “is it really possible to tan through a window?” for them it is elementary. “No,” they will naturally say, and they will be very mistaken, because everyone knows that drivers and people working near windows tan quite well. But the physics of this process is not at all as simple as it seems at first glance.
You don’t need to think long and have any specialized knowledge to answer that it is possible to get sunburned through a car window. It is important to understand how skin darkening occurs and what circumstances can affect it.
The sun's ray contains several types of electromagnetic radiation. The body perceives all of them individually: some are perceived as a source of heat, and others as a source of light. Naturally, no one has ever been able to touch or feel ultraviolet radiation.
There are three types of ultraviolet rays:
1) A-radiation. Radiations of this type are long-wave and completely penetrate the surface of the Planet. A person does not notice the effects of such radiation at all. Rays of this type easily penetrate even into the deep layers of the skin. Because of this, the epidermis ages prematurely, so such radiation is very harmful to the skin. The rays negatively affect the skin: they dehydrate and have a destructive effect on collagen. The skin may even experience severe redness. Many people develop a so-called sun allergy after such radiation. If contact with A-rays is not prolonged, they will not cause severe harm to health.
2) B-radiation. These rays are short wavelength. They make their way to the Earth, although when they encounter interference, the rays are partially scattered. When exposed to B rays, melanocytes produce a pigment called melanin much faster. The fastest tanning can be achieved thanks to this type of radiation. But with prolonged contact, you can get burned and burn.
3) Gamma radiation. Such rays are the most dangerous and have a traumatic effect on all living organisms. Thanks to their good penetrating effect, gamma rays quickly penetrate all living cells. But fortunately, the ozone layer traps most of them. Otherwise, everything on the Planet would burn out. For a person, such radiation is dangerous because he does not feel it at all. Therefore, the consequences can be unpredictable, even fatal. The danger of such radiation lies in the fact that they tend to accumulate in the body.
Based on the above, we conclude: in order for the tan to be equal, contact with ultraviolet rays is still necessary!
Is it possible or not to sunbathe through a window?
Glass is a transparent material that allows light to pass through easily. It blocks gamma and beta rays, but alpha rays cannot be stopped by any glass. And as is already known, A-rays affect the epidermis extremely slowly. The maximum you can get is slightly reddened skin. After some time this will pass. Despite all the great desire, it will not be possible to get an even tan, because the radiation is not so intense.
It is possible to get tanned through a car window, but certain conditions must be observed. First of all, the radiation must be constant. You can get a beautiful tan when your skin has the pigment melanin. Everything is explained very simply: tan tends to wash off and fade. And melanocytes under the influence of the sun produced a lot of melanin. And now, even when exposed to short-wave radiation, the skin will acquire a chocolate color
In everyday life, we often use ready-made blocks of knowledge acquired in childhood, often at school. We practically do not analyze them, a priori considering them indisputable, requiring no additional evidence or analysis. And if you ask us, for example, whether glass transmits ultraviolet light, the majority will confidently answer: “No, it doesn’t, we memorized that at school!”
But one day our friend will appear and say: “You know, I spent the whole day driving yesterday, the sun was merciless, my entire forearm on the side of the window was tanned!” And in response to a skeptical smile, he rolls up his shirt sleeve, showing his reddened skin... This is how stereotypes are destroyed, and a person remembers that by nature he is a researcher.
And yet - what to do with our question? After all, we know that it is ultraviolet radiation that causes skin tanning in people. The answer is not as clear-cut as it might seem at first. And it will sound like this: “It depends on what glass and what ultraviolet!”
Properties of ultraviolet rays
Ultraviolet radiation has wavelengths ranging from approximately 10 to 400 nm. This is a fairly large spread, and, accordingly, rays in different parts of this range will have different properties. Physicists divide the entire ultraviolet spectrum into three different types:
- Type C or hard UV radiation . Characterized by a wavelength from 100 to 280 nm. This radiation got its name for a reason; it is extremely dangerous for humans, leading to skin cancer or rapid eye burns. Fortunately, the range's rays are almost completely blocked by the Earth's atmosphere. A person can only encounter them very high in the mountains, but even here they are extremely weakened.
- Type B or medium UV radiation . Its wavelength is from 280 to 315 nm. These rays cannot be called gentle towards humans either; they are similar in their properties to the previous type, but still act less destructively. Like type C, they are also lost in the atmosphere, but are less retained by it. Therefore, 20% of them still reach the surface of the planet. It is this type of rays that causes tanning on our skin. But this radiation is not able to penetrate ordinary glass.
- Type A or soft UV radiation . From 315 to 400 nm. It doesn’t care about the atmosphere, and it passes unhindered to ocean level, sometimes penetrating even through light clothing. This radiation perfectly overcomes the layer of ordinary window glass, appearing in our apartments and offices, leading to fading of wallpaper, carpets and furniture surfaces. But “A rays” cannot in any way lead to tanning of a person’s skin!
True, extreme ultraviolet radiation with a wavelength below 100 nanometers is also released, but it manifests itself only in conditions close to a vacuum, and in conditions of the earth’s surface it can be neglected.
What should you answer to your motorist friend? Why did his forearm get tanned?
Different types of glass
And here we come to the second part of our answer: “Look at the glass!” After all, glass is different: both in composition and in thickness. For example, quartz allows all three types of UV radiation to pass through it. The same picture is observed when using plexiglass.
And silicate, used in window frames, and in cars, transmits only “soft radiation”.
However, there is one important “BUT” here! If the glass is very thin or very transparent, highly polished (as is the case with a car), it will let in a small fraction of the “B radiation” responsible for our tanning. This is not enough to tan after standing near the window for an hour. But if the driver has spent many hours behind the wheel, exposing his skin to the sun, then it will tan even through closed windows. Especially if the skin is delicate and the case occurs high in relation to sea level.
And now, having heard the question whether ultraviolet radiation passes through glass, we can answer in a very ambiguous way - it does, but only in a limited part of the spectrum, and only if we talk about ordinary window glass.
Solar radiation causes a darkening of the human skin, which is called tanning. It is generally accepted that if sunlight falls through transparent objects, then all its rays fully reach the surface of the skin, so tanning can also occur in this case. But in reality this is not so: a person practically does not sunbathe through glass. This is explained by the fact that glass blocks part of the radiation, which is responsible for the production of melanin in the human body.
Ultraviolet radiation is divided into three types: A, B and C. The first is long-wave: these waves act unnoticed, penetrating the skin and affecting various internal processes. These rays reduce the amount of water, collagen and elastin in the epidermal cells, causing the skin to age faster. Long-wave radiation can cause an allergic reaction and slight redness, but does not contribute to the appearance of a tan, since melanin does not appear in the cells. Under its influence, only...
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Outside the home
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Increasingly, on TV or from friends, each of us hears about skin cancer, which occurs as a result of prolonged exposure to sunlight.
That is why you have to think about whether it is possible to tan through the glass of a window or car, and whether it is necessary to protect your skin with special creams while you are behind the glass.
About the types and properties of UV rays
Want to see if it's really possible to tan through glass? Then why not first figure out how a tan appears on human skin?
First of all, we note that it is a protective reaction of the skin when the rays of the sun begin to affect it, however, this reaction cannot be caused entirely by them, but only by their ultraviolet spectrum.
Since the skin contains cells containing a special pigment - melanin, as soon as it is exposed to rays, the pigment is activated, the skin darkens, interfering...
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Whether it is possible to tan through glass is a controversial issue. Theorists and practitioners have different opinions on this matter. Summer is at its zenith. It's hot outside. Great time for relaxation and travel. But many people do not have the opportunity to go somewhere to relax and tan beautifully on the beach.
Tanning through glass is not possible
Therefore, girls often wonder whether it is possible to get a tan while sitting by the window. After all, the same sunlight hits your skin as it does outside. Unfortunately, this is not possible, since ordinary glass does not transmit ultraviolet rays. And they turn our skin brown. Tanning through glass is unrealistic. This is what practitioners say. An argument in their favor is the white skin around the eyes after wearing sunglasses.
In principle, getting a tan at home is not a problem. You can sunbathe while on an open balcony, in a country house, some even manage to use the roof. But the question is precisely whether it is possible to tan through glass. Everyone...
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Tanning is based on the effect of ultraviolet rays on the skin. There are three types of such rays in total. Those called “C” practically do not reach the earth’s surface, so they cannot seriously affect our skin. But “B” rays allow you to get the desired golden shade very quickly, but in a harmful way. The safest tan is considered to be the one obtained by exposing the skin to rays “A”. True, for a strong effect in this case it takes considerable time. But the result is worth it: this tan is safe and lasts a very long time.
Why does the skin darken?
Special cells in the human body are responsible for changing skin tone, as well as its intensity. They contain the pigment melanin, hence the name melanocytes. By causing the skin to darken, they protect the body from the harmful effects of solar radiation. And the more intense the ultraviolet rays, the more pigment the cells produce. An interesting feature of these cells in...
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Did you get the impression, when you were near the window on a sunny day, that you were sunbathing, even standing behind the glass? For example, when you are in a crowded public transport, where there is no way to move to the shady side of the cabin, or when you are driving a car, you get the feeling that you can even get a sunburn through the glass. Is it even worth thinking about this, is it possible to tan through glass? Let's look into this issue.
Why does a person tan in the sun? I have written a whole article on this topic. In short, because under the influence of ultraviolet rays, the human body produces melanin, which turns the skin a darker color, or, as we call it, a “tan” color. Thus, the body protects us from getting sunburn.
This means that in order to understand the question: “Is it possible to tan through glass?”, you need to find out whether the glass allows these ultraviolet rays to pass through. It turns out that it misses, but not everything.
The fact is that in nature...
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Can you tan through glass? No you can not. Tanning is promoted by ultraviolet radiation, and glass does not allow it to pass through. What happens during sun exposure? Under the influence of ultraviolet radiation, the skin produces a special pigment, melanin, which reflects the waves of the ultraviolet spectrum. In this case, the skin changes to a darker shade, known as tan, and the likelihood of a burn is sharply reduced.
Ordinary glass is not capable of transmitting ultraviolet rays, so sunlight transmitted through window glass does not cause tanning. But you can tan through quartz glass, which transmits ultraviolet radiation well. This property of quartz glass is used in quartz lamps.
To be fair, it should be said that the theoretical possibility of tanning through ordinary glass exists, but it is negligible. The fact is that it still transmits a very small part of the ultraviolet spectrum (315-400 nm), but this part is so insignificant that it does not have a significant...
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Do you want to impress everyone on the beach at the beginning of the season with your appearance and chocolate skin tone, and are you wondering how you can get a tan? There is only one answer - you will have to go to the solarium.
Some people wonder if it's possible to get tanned through window glass. Unfortunately, it is absolutely impossible to get any kind of tan while lying on the balcony. The thing is that a special pigment, melanin, is responsible for darkening the skin. It begins to be produced when human skin is exposed to ultraviolet radiation. With the help of increased production of melanin, the skin begins to protect itself from radiation, preventing the occurrence of sunburn, and darkens. The darker the skin color, the less likely you are to get this burn. That is why, historically, people in the north are white-skinned, while those closer to the equator are dark-skinned.
It is worth noting that about 90% of ultraviolet radiation, which causes the production of melanin, is eliminated in the atmosphere. But ultraviolet radiation that reaches the surface of the earth is not capable of...
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Can you tan through glass?
For many people, the answer to the question of whether you can tan through glass is obvious. Of course, “no,” the majority thinks, and I must admit, they are very mistaken. No, naturally, no one will argue with the fact that drivers and those whose workplaces are in close proximity to a window get a tan quite quickly. But the physics of this process is not as simple as it might seem.
The nature of tanning
In fact, anyone can answer the question whether it is possible to tan through ordinary glass on a balcony or in a car on their own - you do not need any special education for this. The main thing is to first understand how exactly the process of darkening of the skin occurs and what factors influence it.
Any ray of sunlight consists of several different types of electromagnetic radiation. Each of them is perceived by the body in its own way: some are regarded as a source of heat, others – exclusively as light....
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We have all heard more than once that glass does not transmit ultraviolet rays. But people who spend a lot of time, for example, driving a car, are ready to argue with this statement. So is it possible to tan through window glass, or is this just another fiction?
A little physics
Do you want to figure out how ultraviolet radiation works and is it possible to tan through a window? Let's remember the school physics course!
Solar radiation consists of waves of different lengths, which have different effects on the human body.
A-rays easily reach the surface of our planet and are able to penetrate deep into the skin. They do not give a tan as such, but they provoke accelerated aging of the epidermis. This happens because A-rays destroy collagen and dehydrate skin cells. The redness that appears on the skin as a result of their exposure quickly passes. B-rays give us a quick and rich tan. It is thanks to them that our skin acquires a chocolate tint, this type of radiation...
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Many motorists have noticed more than once that the hand closest to the window becomes darker. Do the sun's rays really have the same effect through glass as without it? If this is so, then why is it impossible to achieve a beautiful tan while lying on the balcony? Can you tan through glass? Let's figure it out.
Physics and anatomy in one bottle
The sun's rays consist of different types of electromagnetic radiation. The human body perceives some types as heat, others as light. But we do not see or feel ultraviolet radiation itself.
There are ultraviolet rays of types A, B and C. Let's consider them in more detail.
1) A-radiation is long-wave. It almost completely reaches our planet and affects the body unnoticed. It is type A rays that penetrate into the deep layers of the epidermis. What happens?
The amount of collagen is significantly reduced, and the water and elastin content in skin cells decreases. As a result, the process...
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