00:01
For part a, the frequency of the photon is equal to the change in energy, delta e, divided by the value of planx constant h.
00:12
So delta e here is 5 .9 times 10 to the minus 6 electron volts, and planx constant is 4 .136 times 10 to the minus 15 electron volt seconds.
00:23
So this gives us 1 .4 times 10 to the 9 hertz, or units of inverse seconds, which is the same as hertz.
00:44
We can box that in as part of our solution for a.
00:48
And from this frequency, we can also get a value for the wavelength, since lambda is equal to the speed at which we're traveling, which is the speed of light, c divided by the frequency.
01:00
So plug in 3 times 10 to the 8 meters per second for c and the value we just got for the frequency.
01:05
And this equals 0 .21 meters, which is equal to 21 centimeters.
01:23
So therefore, it is in the ratio part of the electromagnetic magnetic spectrum.
01:28
This is the same value as given in the end of section 41 .3.
01:32
So for b, we can find the magnetic field here...