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

Options

A. `lt 124 kV`
B. `gt 124 kV`
C. Between 60 kV and 70 kV
D. `= 100 kV`

Answer

A

Explanation

`V_("max") = (12400xx10^(-10))/(10^(-11)) = 124kV`
Hence, `V lt 124.2kV`