Lucent Physics Book. We covered all the Lucent Physics Book MCQs in this post for free so that you can practice well for the exam.
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Lucent Physics Book Objective for Students
The device used for measuring the wavelength of X-rays is
(a) GM Counter
(b) Cyclotron
(c) Bragg spectrometer
(d) Mass spectrometer
Option c – Bragg spectrometer
A photon of X-ray has energy of 1 keV. A photon of visible radiation has energy of 3 eV. In this context, which one of the following statement(s) is/are not correct?
(a) The wavelength of X-ray photon is less than the wavelength of visible radiation photon.
(b) Both the photons have different energies.
(c) The speeds of both the photons in vacuum are different.
(d) The frequency of X-ray photon is higher than the frequency of visible radiation photon.
Option c – The speeds of both the photons in vacuum are different
(a) The wavelength of infrared is more than that of ultraviolet radiation.
(b) The wavelength of ultraviolet is smaller than that of visible light.
(c) The photon energy of visible light is more than that of infrared light.
(d) The photon energy of ultraviolet is less than that of visible light.
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