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Dual Nature of Radiation question

2025 · 4 Apr · Shift 1 · Q64
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Dual Nature of Radiation question

2025 · 4 Apr · Shift 1 · Q64

JEE MainPhysicsDual Nature of RadiationMCQ+4 / −1
A small mirror of mass mmm is suspended by a massless thread of length lll. Then the small angle through which the thread will be deflected when a short pulse of laser of energy E falls normal on the mirror (c=\mathrm{c}=c= speed of light in vacuum and g=g=g= acceleration due to gravity)
  1. A
    θ=Emcgl\theta=\frac{E}{m c \sqrt{g l}}θ=mcgl​E​
  2. B
    θ=E2mcgl\theta=\frac{E}{2 m c \sqrt{g l}}θ=2mcgl​E​
  3. C
    θ=3E4mcgl\theta=\frac{3 E}{4 m c \sqrt{g l}}θ=4mcgl​3E​
  4. D
    θ=2Emcgl\theta=\frac{2 E}{m c \sqrt{g l}}θ=mcgl​2E​
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