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A sodium lamp emits light at the power P = 150 W and at the wavelength λ = 550 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 /cm2 s ? (c) What is the rate per square meter at which photons are intercepted by a screen at a distance of 2.30 m from the lamp? (a) Number Units (b) Number Units (c) Number Units

A sodium lamp emits light at the power P = 150 W and at the wavelength λ = 550 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 /cm2 s ? (c) What is the rate per square meter at which photons are intercepted by a screen at a distance of 2.30 m from the lamp? (a) Number Units (b) Number Units (c) Number Units

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A sodium lamp emits light at the power P = 150 W and at the wavelength λ = 550 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 /cm2 s ? (c) What is the rate per square meter at which photons are intercepted by a screen at a distance of 2.30 m from the lamp? (a) Number Units (b) Number Units (c) Number Units

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