- #1
Danielk010
- 34
- 4
- Homework Statement
- I am given the wavelength, number of waves, the wattage, and efficiency of the light bulb. I am also given the width and length of square surface, and the distance between the bulb and said surface.
For this part of the question, it says
"Assuming the emitted photons to be distributed uniformly in space, how many photons per
second strike a x mm by y mm paper held facing the bulb at a distance of delta x m?"
From the previous part of the problem, I calculated the photons emitted per hour and per second.
- Relevant Equations
- # of photons per second = wavelength * E / hc
I am more so stuck on where to start with this problem. I know dividing the photons per second by the area gets me the photon per area, but I am not sure how the distance is related to this part of the problem. If anyone can help, thank you.