1. Tardigrade
  2. Question
  3. Chemistry
  4. If the work function of a metal is 6.63 × 10-19 J, the maximum wavelength of the photon required to remove a photoelectron from the metal is nm. (Nearest integer) [Given: h=6.63 × 10-34 J s, and c =3 × 108 m s -1 ]

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. If the work function of a metal is $6.63 \times 10^{-19} J$, the maximum wavelength of the photon required to remove a photoelectron from the metal is_____ $nm$. (Nearest integer)
[Given : $h=6.63 \times 10^{-34} J s$, and $c =3 \times 10^{8} m s ^{-1}$ ]

JEE MainJEE Main 2022Structure of Atom

Solution:

$\phi=6.63 \times 10^{-19} J =\frac{ hc }{\lambda}=\frac{6.63 \times 10^{-34} \times 3 \times 10^{8}}{\lambda}$
$\Rightarrow \lambda=3 \times 10^{-7} m =300 \,nm$