A photocell, such as that illustrated in Figure 6.7(b), is adevice used to measure the intensity of light. In a certainexperiment, when light of wavelength 560 nm is directed on to thephotocell, electrons are emitted at the rate of 9.6 ✕10-13 C/s. Assume that each photon that impinges on thephotocell emits one electron.
How many photons per second are striking the photocell?
photons/s
How much energy per second is the photocell absorbing?J/s
