UVA and UVB
ultra violet
Sunburn is caused by ultraviolet (UV) radiation from the sun. This type of energy damages the skin cells and can lead to redness, pain, and peeling. UV radiation can also increase the risk of skin cancer.
It gives you a sunburn.
melanin
melanin
It gives shade which prevents sunburn
All stars give out some ultraviolet light (including our Sun, which is why we get sunburn). If the star is young and hot, it gives off quite a lot, and if old and dim, only a little. All stars give off a wide spectrum of radiation, much of it invisible to our eyes. To calculate a star's total radiation, we use what is called a bolometric measurement. The atoms in gases can also give off ultraviolet if their electrons are sufficiently excited by cosmic radiation.
I'm pretty sure they are called radioactive isotopes.
This is a radioactive chemical element.
The sun gives off radiation. An x-ray machine gives off radiation.
Visible light, the Red, Orange, Yellow, Green, Blue, Indigo, Violet colours of the rainbow are just a small part of the electromagnetic radiation spectrum which comprises electromagnetic waves of different wavelength. Beyond the red colour we can see is a part of the spectrum called infrared and heat - the warmth you feel when you hold out your hand towards a fire. Beyond the Blue/Violet colours we can see is a part of the spectrum called ultraviolet and it is this radiation that gives you sunburn.
Well the iPod touch gives off the least radiation ,while the iPad gives off the most radiation. For kids I recommend the iPod or use a computer at home . The iPod and the computer radiation is so low it is harmless.on the other hand the iPad gives of harmful radiation.