yes it does it can cause various types of skin cancer and can afeect the function of the brain.
A honey bee's colour vision extends well into the ultra violet range of the spectrum so thay can see ultra violet light.
Yes, sunlight is good for our body. It stimulates our body to create proteins, just like it helps with photosynthesis in plants. The only thing you need to look out for are UV-rays. The sunlight consists of 'normal' light rays, infrared rays and Ultra-Violet rays. The Ultra-Violet rays are harmful for the human body. It can cause skin cancer when the body is exposed for too long.
You may be referring to an ultra violet light, hand held, which causes certain substances to fluoresce under the UV light. Body oils, semen, blood, fingerprints, security marks on stamps and banknotes are all applications for this simple technique.
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.
High energy photons are absorbed by the conjugated double bonds. The double bonds in the molecule then have the energy to rearrange to a non-conjugated state. The new state is more soluble, so your body can excrete it.
The song is "my body" by Young the Giant. That is the latest one.
Skin colour came from melanin (body pigment) created during process of Melanogenesis. Melanogenesis is the process induced by DNA damage from exposure to UV-B radiation. Ultra Violet radiation had high energy and can cause DNA deformation, such melanin is created to absorb UV and transform radiation energy to heat which is lesser fatal to our cells.
UV-A is an abbreviation for ultra-violent rays. Ultra-violent rays can cause melanin cell reproduction, which causes tanning. It also can cause severe skin damage if the body's skin is exposed for too long.
Black is the color that really absorbs the sun. Since its dark only light colors will reflect the sun.
External to the body, alpha is not dangerous because it is easily stopped by the skin, but it becomes dangerous if ingested because it can then access internal sensitive organs directly. For electromagnetic radiation, visible light and infra-red are the least damaging. Ultra-violet causes sunburn)
There shouldn't be any heating of anything with ultra sound. Not strong enough to affect the tissue in that way. The machine simply records the difference in density and produces a picture.
The body has to maintain a small percentage of copper. It is needed especially in the liver and muscles, as well as other parts of the body. A deficiency can lead to a drop in metabolism, high triglycerides, higher sensitivity to ultra-violet light, or depression. In contrast, an overdose of copper can be fatally toxic and copper consumption has been used to commit suicide.