1.

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 .....

Answer»

`lt 124.2kV`
`gt 124.2kV`
between 60 kv and 70 kv
`=100 kV`

Solution :`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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