Question

Hard X-rays for the study of fractures in bones should have a minimum wavelength of 10⁻¹¹ m. What is the accelerating voltage for electrons in X-ray machine?​

Answer 1

Explanation:

HII YOUR ANSWER IS----

eVo= hvmax

Vo= 12400 x 10 - 10^-11

Vo= 124kv

EXTRA INFO-The accelerating voltage should be less than 124KV cause the wavelength given is minimum wavelength hence the voltage will always be less as the denominator will only increase making 124KV the maximum voltage.

HOPE ITS HELPFUL

Answer 2

Explanation:

From conservation of energy the kinetic energy of electron equals the maximum photon energy (we

neglect the work function ~ because it is normally so small compared to eV0)

∴ev0=hvmax or ev0=hcλmin

∴V0=hceλmin

or v0=12400×10−1010−11=124 kV

Hence, accelerating voltage for electrons in X-ray machine should be less than 124 kV