Sunlight is the primary source of vitamin D which helps us absorb calcium for stronger, healthier bones. But sun produces invisible rays called ultraviolet-A (UVA) or ultraviolet-B (UVB) rays that can cause skin damage, eye damage, immune system suppression and skin cancer. So don't spend much time in sunlight
it reacts by burning where you have touched something
No, citric acid is stable in normal light.
Sodium metal can react violently with water to produce sodium hydroxide and hydrogen gas, which can cause burns if it comes in contact with skin.
This will heat the skin up.
The wavelength of visible light is longer than a human skin cell. Visible light has wavelengths ranging from about 400 to 700 nanometers, while a human skin cell is typically around 30 micrometers in size.
it because of they skin react to the whether
No. A sauna is (in simple terms) a steam bath. In order for your skin to darken, the melanin in your body needs to react with ultra-violet light.
When earthworms are in light too long, they become paralyzed, their skin falls off, and then they die.
Tanning beds mainly emit UVA light (the lower end of the ultraviolet spectrum) to react with the melanin pigment in the skin.
moon light is sunlight reflected off the moon, skin produces vitamin D when exposed to the UVB rays from sunlight. The amount of light reflected back from the moon is relatively low and so the skin does not react as strongly to it. sunlight on its own does not contain vitamins.
it moves towards the light
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No, you cannot feel infrared light on your skin as it is not within the visible spectrum of light that can be detected by our skin receptors.
It is possible to describe the color of skin as light. More specifically, light skin is beige in color. If skin is extremely pale, it might be described as alabaster.
it means you have light skin
They're light (bent but real light), and your eyes react to light.
A color such as "light blue" tells us how the object will react to visible light. Basically, it doesn't say anything about how it will react to infrared radiation.