- Sunlight consists of 2 types of light waves or radiation; visible and invisible. Visible light has a spectrum of 7 colors ranging from red to violet. Invisible ultraviolet (UV) radiation is not possible for detection to the human eye, e.g. infrared and X-rays. UV radiation is further divided into 3 different types – UVC, UCB and UVA.
- The very toxic UVC is filtered out by the ozone layer. The ozone layer also filters UVB but about 1% of UVB still passes through to reach earth. UVB is what causes sunburn and even skin cancers after prolong exposure.
- Whether the weather is windy, cloudy or foggy during the day, harmful UV rays are still able to penetrate through.
Tuesday, July 5, 2011
Ultra Violet Rays - Amrit, Zhixiang, Mohit
We learnt that