00:01
Hi, so to solve for this, we will use this formula for energy of a photon.
00:07
Energy of a photon is given to planck's constant, h, multiplied by the speed of light, c, over the wavelength.
00:13
Now, since we are given with the energy, we will rearrange this to solve for wavelength, h, planck's constant, speed of light, c, over the energy of a photon.
00:23
Now plug in the information that we have.
00:25
Planck's constant is given here, it's 6 .626 times 10 to the negative 34 joules seconds.
00:32
And it would be better if you could just memorize this constant, because it's not usually given in problems like this.
00:37
Now c is the speed of light, and this is also a constant, 3 times 10 to the power of 8 meters per second over energy 7 .20, 6 times 10 to the negative 19 joules...