A) takes place
B) doesn't take place
C) may or may not take place
D) depends on frequency
Correct Answer: A
Solution :
If kinetic energy of photoelectron emitted from metal surface is \[{{E}_{k}}\] and \[w\] is the energy required to eject photoelectron's frame the metal, then from Einstein's photoelectron equation is \[{{E}_{k}}=hv-w\] \[E=\frac{hc}{\lambda }\] Since, wavelength is reduced from \[2300\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\] to \[1800\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\] is energy increases have emission takes place.
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