JEE Main 10 Apr 2019 Paper 2 Solved Paper

Section: Physics

Question : 23 of 90

Marks: +1, -0

A 2mW laser operates at a wavelength of 500nm.The number of photons that will be emitted per second is:{Given plank’s constant h=6.6×10−34JS ,speed of light c=3.0×108 m / s }

[10 Apr 2019 Shift 2]

5×1015
1×1016
2×1016
1.5×1016

Validate

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