00:01
All right, so in this important to know that for any electromagnetic radiation, no matter what it is, the speed of the electromagnetic radiation, which is the speed of light, the speed of all radiation, is the radiation's wavelength times its frequency.
00:20
Okay? so in this problem, we know the frequency of a microwave oven, and we want to find its wavelength.
00:26
Its wavelength is going to be c over f, and so speed, or c is the speed of light, which for all radiation is 3 times 10 to the eighth meters per second.
00:44
All right, in this problem, the frequency of the microwave oven is 2 .45 gigahertz.
00:53
This giga means 10 to the 9th, and hertz is just a fancy way of saying one over second...