JEE Mains · Chemistry · STD 11 - 2. structure of atom
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 \(c =3 \times 10^{8} \,m\, s ^{-1}\) ]
- A \(300\)
- B \(30\)
- C \(45\)
- D \(100\)
Answer & Solution
Correct Answer
(A) \(300\)
Step-by-step Solution
Detailed explanation
\(\phi=6.63 \times 10^{-19} \,J =\frac{ hc }{\lambda}=\frac{6.63 \times 10^{-34} \times 3 \times 10^{8}}{\lambda}\) \(\Rightarrow \lambda=3 \times 10^{-7} m =300\, nm\)
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