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  • Threshold wavelength for a metal is . The photoelectron will be ejected, if it is irradiated by light from:<

Threshold wavelength for a metal is 5200 \AA. The photoelectron will be ejected, if it is irradiated by light from:

Option: 1

50 W infrared lamp


Option: 2

 1 W infrared lamp
 


Option: 3

 50 W ultraviolet lamp 


Option: 4

 0.5 W infrared lamp


Answers (1)

best_answer

Wavelength \alpha \ \ \frac{1}{\text{Energy}}. Hence, wavelength should be smaller than threshold wavelength.

Posted by

Gautam harsolia

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