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Dual Nature of Radiation question

2017 · 9 Apr · Shift 1 · Q54
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Dual Nature of Radiation question

2017 · 9 Apr · Shift 1 · Q54

JEE MainPhysicsDual Nature of RadiationMCQ+4 / −1
A Laser light of wavelength 660 nm is used to weld Retina detachment. If a Laser pulse of width 60 ms and power 0.5 kW is used the approximate number of photons in the pulse are : [Take Planck's constant h === 6.62 ×\times× 10 −-− 34 Js]
  1. A
    1020
  2. B
    1018
  3. C
    1022
  4. D
    1019
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