1.

A photon of frequency n causes photoelectric emission from a surface with threshold frequency \[{{n}_{0}}\].The de Broglie wavelength\[\lambda \]of the photoelectron emitted is given as

A. \[\Delta n=\frac{h}{2m\lambda }\]         
B. \[\Delta n=\frac{h}{\lambda }\]
C. \[\left[ \frac{1}{{{v}_{0}}}-\frac{1}{v} \right]=\frac{m{{c}^{2}}}{h}\]
D. \[\lambda =\sqrt{\frac{h}{2m\Delta n}}\]
Answer» E.


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