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

Energy from the sun is received on the earth at the rate of 2 cal per cm² per min. If average wavelength of solar light be taken at 5500 Å, then how many photons are received on the earth per cm² per min ? \[\left( h=6.6\times 10^{-34}J-s,cal = 4.2 J \right)\]
\[1.5\times 10^{13}\]
\[2.9\times 10^{13}\]
\[2.3\times 10^{19}\]
\[1.75\times 10^{19}\]

No solution provided for this question.

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