2006-12-15 02:28:36 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
Electromagnetic radiation only includes b) x-rays and c) ultraviolet radii from the given list.
It includes much more, from 50 or 60hz electric transmission lines, through long wave, short wave, vhf and uhf "radio waves", microwave and infrared radiation, visible light all the way to gamma rays.
It excludes a) sound which is mechanical vibration in air, gases, liquids or solids.
Sound requires medium to propagate in, while electromagnetic radiation does. Some media (such as electro-conductive or magnetic media) actually prevent the propagation of el-mag radiation.
2006-12-15 02:42:36 · answer #1 · answered by Anonymous · 0⤊ 0⤋
mark twains credited with it right here................ Longitude the actual tale of a Lone Genius Who Solved the suitable scientific concern of His Time by Dava Sobel financial disaster One: Imaginary strains while i'm playful i take advantage of the meridians of longitude and parallels of selection for a seine, and drag the Atlantic Ocean for whales. - Mark Twain, life on the Mississippi
2016-12-30 11:33:28 · answer #2 · answered by ludwig 3 · 0⤊ 0⤋
a) Sound waves are compressive waves, not electromagnetic energy
2006-12-15 02:35:53 · answer #3 · answered by Dave_Stark 7 · 0⤊ 0⤋
Sound!
2006-12-15 03:59:35 · answer #4 · answered by Billy Butthead 7 · 0⤊ 0⤋
a) sound
2006-12-15 02:37:12 · answer #5 · answered by nine kids 2 · 0⤊ 0⤋
B) RAYS
2006-12-15 13:20:56 · answer #6 · answered by ? 2 · 0⤊ 0⤋