JEE Mains · Physics · STD 12 - 11. Dual nature of radiation and matter
Light is incident on a metallic plate having work function \( 110\times10^{-20} \) J. If the produced photoelectrons have zero kinetic energy then the angular frequency of the incident light is __________ rad/s. (\( h=6.63\times10^{-34} \) J.s)
- A \( 1.04\times10^{16} \)
- B \( 1.04\times10^{13} \)
- C \( 1.66\times10^{16} \)
- D \( 1.66\times10^{15} \)
Answer & Solution
Correct Answer
(A) \( 1.04\times10^{16} \)
Step-by-step Solution
Detailed explanation
\( \phi=h\nu \) \( \nu=\frac{\phi}{h} \) \( \omega=2\pi \nu=\frac{2\pi\phi}{h}=\frac{2\times3.14\times110\times10^{-20}}{6.63\times10^{-34}} \) \( \omega=1.04\times10^{16}\,rad/sec \)
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