A photocell is a device used to measure the intensity of light. In a certain experiment, when light of wavelength 530 nm is directed on to the photocell, electrons are emitted at the rate of 5.1 10-13 Coulombs/sec. Assume that each photon that impinges on the photocell emits one electron.
How many photons per second are striking the photocell?
To find the number of photons per second that are striking the photocell, we'll need to use the formula:
Number of photons = Rate of electron emission / Number of electrons per photon
In this case, we are given the rate of electron emission (5.1 x 10^-13 C/s), and we know that each photon emits one electron. This means that the number of electrons per photon is 1.
So, to find the number of photons per second, we divide the rate of electron emission by the number of electrons per photon:
Number of photons = (5.1 x 10^-13 C/s) / (1 electron/photon)
Number of photons = 5.1 x 10^-13 C/s
Therefore, the number of photons per second striking the photocell is 5.1 x 10^-13 photons/s.