(C) The work function $W_0$ is given by the formula $W_0 = \frac{hc}{\lambda_0}$.Here,$h = 6.625 \times 10^{-34}\;J\cdot s$,$c = 3 \times 10^8\;m/s$,a

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(C) The work function $W_0$ is given by the formula $W_0 = \frac{hc}{\lambda_0}$.Here,$h = 6.625 \times 10^{-34}\;J\cdot s$,$c = 3 \times 10^8\;m/s$,and $\lambda_0 = 5000\;\mathring{A} = 5000 \times 10^{-10}\;m$.Substituting the values:$W_0 = \frac{6.625 \times 10^{-34} \times 3 \times 10^8}{5000 \times 10^{-10}}$$W_0 = \frac{19.875 \times 10^{-26}}{5 \times 10^{-7}}$$W_0 \approx 3.975 \times 10^{-19}\;J \approx 4 \times 10^{-19}\;J$.

Class 12 Physics Dual Nature of Radiation and matter Einstein's Photoelectric Equation and Energy Quantum of Radiation

Easy

The threshold wavelength for the photoelectric effect on sodium is $5000\;\mathring{A}$. Its work function is:

AIPMT 1988 All AIPMT

A
$1\;J$
B
$3 \times 10^{-19}\;J$
C
$4 \times 10^{-19}\;J$
D
$2 \times 10^{-19}\;J$

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Dual Nature of Radiation and matter

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Einstein's Photoelectric Equation and Energy Quantum of Radiation

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AIPMT 1988 Paper All AIPMT years →

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The photoelectric cut-off voltage in a certain experiment is $1.5 \; V$. What is the maximum kinetic energy of photoelectrons emitted?

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The threshold wavelength for the photoelectric effect on sodium is $5000\;\mathring{A}$. Its work function is:

Similar Questions

If the work function of $Na$ metal is $2.3 \ eV$,in which of the following regions of the $EM$ spectrum does the threshold wavelength lie?

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