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De Broglie Waves - Questions and Answers

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6. The wave nature of electron is applied in the field of
A. electron microscopy
B. fusion reactors
C. artificial radioactivity
D. satellite launching
Explanation:
7. In an electron microscope, the object is enclosed in
A. a glass plate
B. liquid
C. water
D. colloidal film
Explanation:
8. A magnetic lens can focus
A. sound waves
B. - rays
C. a beam of light
D. a beam of electrons
Explanation:
9. The de Broglie wavelength λ of an electron of mass ‘m’ and charge ‘e’ accelerated from rest by the application of a potential ‘V’ is given by
A.
B.
C.
D.
Explanation:
10. In an electron microscope, electrons are focused by means of
A. convex lens
B. concave mirror
C. liquid lens
D. magnetic lens
Explanation:
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