00:01
So here we have a list of frequencies and we need to calculate the wavelength for each frequency.
00:12
So we will always be using the equations.
00:22
Sorry about that.
00:25
C is equal to wavelength times frequency.
00:32
And we can use 3 times 10 to the 8 meters per second is equal to that.
00:42
And so for part a, we will use wavelength as equal to 3 times 10 to the 8th divided by 7 .5 times 10 to the 14th.
01:08
So it's equal to 4 times 10 to the negative.
01:35
Four, five, six, seven, ten to the negative seven per second.
01:45
And we need to tell what kind of radiation this is.
02:00
And since it's part of a visible light spectrum, it is visible light.
02:15
Part b, we have three times ten to the eighth divided by the given frequency, one times ten to the tenth.
02:29
So this is equal to three times 10 to the negative 2...