Question

If accelerating voltage of X-ray tube is 13 kv find minimum wavelength of X-ray
l = 12400/13k

(1) 1 Å (2) 0.82 Å (3) 0.95 Å (4) 1.72 Å

With steps please

Answer 1

Q. If accelerating voltage of X-ray tube is 13 kv find minimum wavelength of X-ray,

answer : option (3) 0.95A°

explanation : acceleration voltage of X-ray tube , V = 13 kv

so, energy , E = accelerating potential × charge on electron

= 13 × 10³ v × 1e

= 13000 eV

we know,

E (in eV) = 12400/wavelength (in A°)

or, 13000 eV = 12400/wavelength (in A°)

or, wavelength = 12400/13000

= 124/130 = 0.95 A°

hence, maximum wavelength of X-ray is 0.95 A°