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what should be the velocity of an electron so that its momentum becomes equal to that of a photon of wavelength `5200 Å`A. 700m/sB. 1000 m/sC. 1400 m/sD. 2800 m/s |
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Answer» Correct Answer - C `P_(e)=O_(ph)` `mv=(hc)/(lambda)` `" " v=(hc)/(lambdaxxm)` `" " =(6.67xx10^(-34)xx3xx10^(8))/(5200xx10^(-10)xx9.1xx10^(-31))` `~~ 1400 m//s` |
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