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MHT CET202618 April 2026Morning ShiftPhysicsDual Nature of MatterActual

In case of photoelectric emission from certain metal, the cutoff frequency is . If the radiation of frequency 3 is incident on the metal plate, the maximum possible velocity of the emitted electrons will be ( m = mass of electron, h = Planck's constant)

Options

  1. Ah 2m
  2. Bh m
  3. C2 ( h m )
  4. D2h m

Correct answer

C. 2 ( h m )

Step-by-step solution

According to Einstein's photoelectric equation: K_ max = h _ incident - h _ cutoff Given _ incident = 3 and _ cutoff = : 1 2 mv_ max ^2 = h(3 ) - h 1 2 mv_ max ^2 = 2h v_ max ^2 = 4h m v_ max = 2 h m Answer: 2 ( h m )

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