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Types of Ultraviolet Radiation

By Janice VanCleave

Sun Block

What is the difference between UVA, UVB, and UVC? Answer: UV-A= Aging. This UV radiation can penetrate and damage the cell. About 98% of the UV radiation reaching Earth’s surface is UV-A. UV-B= Burning. This UV radiation is mainly what causes sunburns. Most of the radiation is absorbed in by the ozone layer in Earth’s […]

Filed Under: Physics Tagged With: sun block, ultraviolet radiation

Black Light

By Janice VanCleave

The phosphors in the scorpion's exoskeleton have a turquoise glow under a black light.

What is a Black Light? What are Phosphors? “Black Light” seems to be an erroneous name because when a black light is turned on in a dark room, everything is bathed in a beautiful purple color. But what you do not see is the  ultraviolet radiation that is being emitted. In black lights, the radiation […]

Filed Under: Physics Tagged With: black light, phosphors, ultraviolet radiation, UVA, UVB, visible light

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Welcome to Janice’s Science Extravaganza!

The spoon hanging from the string vibrates when struck and these vibrations are transmitted through the string and the sound is amplified by the plastic cups. ABOUT ME: Hi, I am Janice VanCleave, author of 50 best-selling science experiment books for children ages 4 through high school. I taught science for 27 years. MORE.....

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