Rankers Physics
Topic: Modern Physics
Subtopic: Photoelectric Effects and deBroglie Equation

A 200 W sodium street lamp emits yellow light of wavelength 0.6μm. Assuming it to be 25% efficent converting electrical energy to light, the number of photons of yellow light it emits per second is :
\62\times 10^{20}\]
\3\times 10^{19}\]
\1.5\times 10^{20}\]
\6\times 10^{18}\]

No solution provided for this question.

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