The threshold frequency of a metal is $4 \times {10^{14}}{{\rm{s}}^{ - 1}}.$. The minimum energy of photon to cause photoelectric effect is:

$2.64 \times {10^{ - 19}}{\rm{\;J}}$

$3.06 \times {10^{ - 12}}{\rm{\;J}}$

$1.4 \times {10^{ - 18}}{\rm{\;J}}$

$3.4 \times {10^{ - 19}}{\rm{\;J}}$

NEET UG CHEMISTRY MCQ: STRUCTURE OF ATOM

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The threshold frequency of a metal is

4 \times {10^{14}}{\mathrm{s}^{ - 1}}.

. The minimum energy of photon to cause photoelectric effect is:

View answer and explanation

Correct option: D

2.64 \times {10^{ - 19}}\mathrm{\;J}

Option D (

2.64 \times {10^{ - 19}}\mathrm{\;J}

) is correct because the minimum energy is the product of Planck's constant and the threshold frequency.

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