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An electron and a photon, each has a wav...

An electron and a photon, each has a wavelength of `1.2A`. What is the ratio of their energies?

A

0.048611111111111

B

`1:10^(2)`

C

`1:10^(3)`

D

`1:10^(4)`

Text Solution

Verified by Experts

The correct Answer is:
B
`(E_e)/(E_(ph))=((h^2)/(2mlada^2))/((hc)/(lamda))=(h^2)/(2mlamda^2)xx(lamda)/(hc)xx(h)/(2lamdac)`
`=(6.6xx10^(-34))/(2xx9.1xx10^(-31)xx1.2xx10^(-10)xx3xx10^(8))`
`(1)/(100)`
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