NCERT Class XII Chapter <br>Dual Nature of Radiation and Matter <br> Questions With Solutions

NCERT Class XII Chapter
Dual Nature of Radiation and Matter
Questions With Solutions

Question : 1

Total: 37

Find the :
(a) maximum frequency, and
(b) minimum wavelength of X-rays produced by 30 kV electrons.

Solution:

(a) Maximum energy of X-ray photon = Maximum energy of an accelerated electron
hvmax = eV
∴ vmax =

1.6×10−19×30×103

6.63×10−34

= 7.24 × 1018 Hz
(b) λmin =

vmax

3×108

7.24×1018

= 0.0414 × 10−19 = 0.0414 nm

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