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De Broglie Waves - Questions and Answers

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11. The de Broglie wavelength λ of a particle of mass ‘m’ moving with a velocity ‘v’ is
A.
B.
C.
D.
Explanation:
12. The wave associated with a moving particle is called
A. longitudinal wave
B. mechanical wave
C. de Broglie wave
D. Planck’s wave
Explanation:
13. The momentum of an electron, if its wavelength is 2Å, is
A. 2.3  10-24 kg ms-1
B. 3.315  10-24 kg ms-1
C. 1.3  10-24 kg ms-1
D. 13  10-24 kg ms-1
Explanation:
14. The de Broglie wavelength associated with an electron moving with a speed of 107m/s
A. 0.728 Å
B. 7.28 Å
C. 72.8 Å
D. 728 Å
Explanation:
15. The focal length of magnetic lens used in an electron microscope depends on
A. the velocity of electrons
B. the magnitude of current passing through energizing coils
C. the medium in between energizing coils
D. all the above
Explanation:
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