Question

Consider a stream of photons with λ = 800 nm and power Pl = 0.5 uW falling on a sensor. Calculate the energy of each photon, and the number of photons incident on the detector per second? thanks

Answer 1

Energy of a photon = Planck constant times frequency
You know wavelength, so you know frequency.
# of photons detected per second = power/energy of a photon

Answer 2

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