00:12
In this question we're asked how many photons are needed to raise the temperature of your eye by 3 degrees celsius.
00:18
So we're given all this information and we're going to go ahead and start.
00:23
The first thing we want to do is find out the energy of the amount of photons that we need.
00:29
So for this we can use planx equation, which is energy equals planks constant multiplied by the speed of light divided by the wavelength.
00:41
Now this can be used for one photon.
00:48
If we want to find this energy for multiple photons, we can simply add an n.
00:56
So this will signify the number of photons, and this will give us the energy needed for multiple photons.
01:08
So now, we're asked a temperature question, so that should immediately bring your bind back to this equation.
01:14
Q equals m, c, delta, t.
01:20
Now we can actually replace q with the energy because in this case we're not trying to find the amount of heat energy.
01:32
We're trying to find the amount of energy based on the photons...