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when photons of energy 4.25ev strike at surface of a metal A, the ejected e- have maximum kinetic energy, Ta & de broglie wavelength lemda a the k max of e- emitted from other metal B by photons of energy 4.20ev is Tb = Ta - 1.50ev. If de broglie wavelength of these e- is lemda B = 2*lemda A then which is not correct? A; work function of A is 2.25ev B; work function of B is 3.70ev C; Ta=2ev D; Tb=2.75ev

when photons of energy 4.25ev strike at surface of a metal A, the ejected e- have maximum kinetic energy, Ta & de broglie wavelength lemda a the k max of e- emitted from other metal B by photons of energy 4.20ev is Tb = Ta - 1.50ev. If de broglie wavelength of these e- is lemda B = 2*lemda A then which is not correct?
A; work function of A is 2.25ev
B; work function of B is 3.70ev
C; Ta=2ev
D; Tb=2.75ev

Grade:11

2 Answers

SAGAR SINGH - IIT DELHI
878 Points
13 years ago

Dear dhawal,

inorrect option is b)

?

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Sagar Singh

B.Tech, IIT Delhi

Karan Madan
33 Points
7 years ago
How (b) Pls Elaborate Please feel free to ask your queries here. We are all IITians and here to help you in your IIT JEE preparation.

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