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The wavelength of the electromagnetic r...

The wavelength of the electromagnetic radiations whose photon has energy of 5eV is

A

5000 A

B

2486 A

C

4268 A

D

3386 A

Text Solution

Verified by Experts

The correct Answer is:
B
`5eV=5xx1.6xx10^(-19)J, E=hv=(hC)/(lambda)`
`:.lambda=(hC)/(E)=(6.63xx10^(-34)xx3xx10^(8))/(5xx1.6xx10^(-19))`
`=2.486xx10^(-7)=2486 Å`
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MARVEL PUBLICATION-ELECTRONS AND PHOTONS -TEST YOUR GRASP - 17
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