A sodium lamp emits light at the power P = 150 W and at the wavelength λ = 595 nm, and the emission is 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 /cm²s? (c) What is the rate per square meter at which photons are intercepted by a screen at a distance of 1.90 m from the lamp? (a) Number (b) Number i (c) Number i Units Units Units î ◊
A sodium lamp emits light at the power P = 150 W and at the wavelength λ = 595 nm, and the emission is 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 /cm²s? (c) What is the rate per square meter at which photons are intercepted by a screen at a distance of 1.90 m from the lamp? (a) Number (b) Number i (c) Number i Units Units Units î ◊
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Transcribed Image Text:A sodium lamp emits light at the power P = 150 W and at the wavelength λ = 595 nm, and the emission is
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 /cm²s? (c) What is the rate per square
meter at which photons are intercepted by a screen at a distance of 1.90 m from the lamp?
(a) Number
(b) Number i
(c) Number
i
Units
Units
Units
î
◊
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