First slide
Quantum Theory of Light
Question

Consider two light sources of wavelength λ1andλ2 λ1>λ2  which are emitting n1 and n2 photons respectively, in a given time.Assume equal power for both the sources, then

Moderate
Solution

Power=Energytime=n1hcλ1Δt=n2hcλ2Δtn1n2=λ1λ2asλ1>λ2n1>n2

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