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JEE Main 202228 JuneMorning Shift
Exam
JEE Main
Year
2022
Date
28 June
Shift
Morning Shift
Subject
Chemistry
Chapter
Structure of Atom

JEE Main 2022 · 28 June · Morning Shift · Chemistry · Structure of Atom

If the work function of a metal is 6 . 63 × 10 ^ - 19 J , the...

If the work function of a metal is 6.63×10−19J6 . 63 \times {10}^{- 19}J, the maximum wavelength of the photon required to remove a photoelectron from the metal is____nmnm. Nearest integer)
[Given : h=6.63×10−34Jsh = 6 . 63 \times {10}^{- 34}Js, and c=3×108ms−1c = 3 \times {10}^{8}m{s}^{- 1}]

Correct answer

0

Step-by-step solution

Eincident=W0+K.E.{E}_{incident} = {W}_{0} + K . E .

As K.E is zero

Eincident=W0{E}_{incident} = {W}_{0}

6.63×10−19=hcλ=6.63×10−34×3×108λ6 . 63 \times {10}^{- 19} = \dfrac{hc}{\lambda} = \dfrac{6 . 63 \times {10}^{- 34} \times 3 \times {10}^{8}}{\lambda}

λ=3×10−7m=300nm\lambda = 3 \times {10}^{- 7}m = 300nm.

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