A 100 W sodium lamp (l 589 nm) radiates energy uniformly in all directions. (a) At what
Chapter 38, Problem 9(choose chapter or problem)
A 100 W sodium lamp (l 589 nm) radiates energy uniformly in all directions. (a) At what rate are photons emitted by the lamp? (b) At what distance from the lamp will a totally absorbing screen absorb photons at the rate of 1.00 photon/cm2 s? (c) What is the photon flux (photons per unit area per unit time) on a small screen 2.00 m from the lamp?
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