Question

Calculate highest frequency of X-rays emitted
if bombarded electrons are accelerated at
30kV.
यदि 30 kV पर त्वरित इलेक्ट्रॉन्स की बमबारी लक्ष्य
पर की जाए तो उत्सर्जित एक्स-रे की उच्चतम
आवृत्ति की गणना करें।​

Answer 1

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12th

Physics

Electromagnetic Waves

Properties and Uses of Different Radiation

Find the(a) maximum frequen...

PHYSICS

Find the

(a) maximum frequency

(b) Minimum wavelength of X-rays produced by 30 kV electrons.

MEDIUM

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ANSWER

(a). Potential of the electrons, V=30kV=3×10

4

V

Hence, energy of the electrons, E=3×104eV

Where,

e = Charge on an electron = 1.6×10

−19

C

Maximum frequency produced by the X-rays is ν

The energy of the electrons is given by the relation is E=hν

Where,

h = Planck’s constant = 6.626×10

−34

Js

ν=E/h=7.24×10

18

Hz

(b). Energy of a electron, E=30×10

3

eV

Let Maximum frequency produced by the X-rays be ν

ν=E/h=1.6×10

−19

×3×10

4

/6.626×10

−34

=7.24×10

18

Hz where h is the planck's constant.

The minimum wavelength produced by the X-rays is given as-

λ=c/ν=0.0414nm

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