Dual Nature of matter and Radiation Part 2

Section: Physics

Question : 85 of 100

Marks: +1, -0

A parallel beam of light of wavelength 900‌nm and intensity 100Wm−2 is incident on a surface perpendicular to the beam. The number of photons crossing 1cm2 area perpendicular to the beam in one second is :

[26-Jul-2022-Shift-1]

3×1016
4.5×1016
4.5×1017
4.5×1020

Validate

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