State how many photons per second are striking the photocell

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Reference no: EM13181397

A photocell is a device used to measure the intensity of light. It works because photons that hit the photocell cause electrons to move through the cell's circuits. In other words the light energy is changed into electricity. Rember, electricity (or current) is just the flow of electrons. In a certain experiment when light of wavelenght 630 nm is directed onto a photocell a current (of electricity) is produced at a rate of 2.6x10^-12 C/s (Coulombs per second). Assume that each photon that hits the cell causes one electron to be emitted. The charge on each electron is 1.602x10^-19 C (Coulombs).

A. How many photons per second are striking the photocell?

B. How much energy is mJ/s (millijoules per second) is the photocell absorbing?

Reference no: EM13181397

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