Dual Nature of Radiation and Matter

Subject matter experts of JagranJosh have developed chapter wise practice questions of Class 12th as per the relevancy of the chapter in the CBSE board exam. This practice set contains 10 questions with detailed explanations on “Chapter: Dual Nature of Radiation and Matter” of Physics.

  • Q1. The energy of photon is equal to the K.E. of a proton. The energy of the photon is E. Let λ 1  be the deBroglie wavelength of the proton and  λ 2  be the wavelength of the photon. The ratio  λ 1 / λ 2  is  proportional to

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  • Q2.In the Davisson and Germer experiment, the velocity of electrons emitted from the electron gun can be increased by

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  • Q3.In Davisson – Germer experiment, if the angle of diffraction is 52°, then the glancing angle will be:

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  • Q4.The Davisson-Germer experiment demonstrated the

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  • Q5. If λ o  and  v o  are threshold wavelength and frequency, then for a light having wavelength λ and  frequency  v o  the photoelectric effect will take place if

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  • Q6.A deuteron moving with velocity 2v and an alpha particle moving with velocity v, what is the ratio of de-Broglie wavelengths associated with it?

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  • Q7. The deBroglie wavelength associated with a small particle changes by 0.25% if its momentum is changed by  p 0 . The initial momentum was

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