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NEET UG PHYSICS MCQ: DUAL NATURE OF RADIATION AND MATTER

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Application +4 | -1

Two identical metal plates shown photoelectric effect by a light of wavelength

\lambda \mathop A\limits^ \circ

falls on plate A and

{\lambda _B}

on plate

B\left( {{\lambda _A} = 2{\lambda _B}} \right).

The maximum kinetic energy is

View answer and explanation

Correct option: B

{K_A} < {K_B}/2

Option B (

{K_A} < {K_B}/2

) is correct because the kinetic energy is inversely proportional to the wavelength, and the wavelength of A is twice that of B.

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If the Broglie wavelengths associated with a proton and an

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3 \times {10^{ - 4}}\,T.

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