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Physics

NEET PhysicsClass 12Photoelectric effect and wave theory of lightMediumAssertion–Reason

Question 8 of 10

A photocell is lit by extremely faint light above its threshold frequency, and a current starts to flow at once. Read the Assertion (A) and Reason (R) and choose the correct option.

  • Assertion (A): Photoelectrons appear with no measurable delay, even when the light is very dim.
  • Reason (R): Light energy arrives in discrete photons, and a single photon can give its whole energy hν to one electron at once.

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