00:01
Hi, so to solve for this, we will use this equation.
00:07
Energy of a photon is equivalent to planck's constant multiplied by the speed of light, c, over the wavelength.
00:13
And our unknown here is the wavelength.
00:15
We're given with the energy, so that means we're going to rearrange this equation.
00:19
Planck's constant, h, c, speed of light, over the energy.
00:23
And then we'll plug in the values of our constants.
00:28
H is 6 .626 times 10 to the negative 34 joules seconds.
00:34
Speed of light is 3 times 10 to the power of 8 meters per second over the given energy, 5 .42 times 10 to the negative 19 joules.
00:46
So that means we could cancel some units here...