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Hard X-rays for the study of fractures i...

Hard X-rays for the study of fractures in bones should have a minimum wavelength of `10^(-11)`m. The accelerating voltage for electron in X-ray machine should be .....

A

`lt 124.2kV`

B

`gt 124.2kV`

C

between 60 kv and 70 kv

D

`=100 kV`

Text Solution

Verified by Experts

The correct Answer is:
B
`lambda_("min")=(hc)/(eV)=(1.242xx10^(-6))/(V)`
`:.V=(1.24xx10^(-6))/(10^(-11))=124.2kV`
The accelerating voltage for electrons in X-ray machine should be greater than
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