Question

Which of the following is true for X-rays –

• A. Wavelength of continuous X-rays does not depend on potential difference
• B. Wavelength of discrete X-rays does not depend on potential difference
• C. Discrete X-rays have energy of the order of MeV
• D. Continuous X-rays have energy of the order of MeV

Answer 1

Answer: (B)

Wavelength of discrete X-rays does not depend on potential difference

Answer 2

Continuous X-rays are produced by the deceleration of electrons whose K.E. depends on the potential difference.

Discrete X-rays are produced when an electron makes transition between energy levels which have fixed values and hence does not depend on potential difference.