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Dual Nature of Radiation and Matter question

2023 · Q154
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Dual Nature of Radiation and Matter question

2023 · Q154

NEETPhysicsDual Nature of Radiation and MatterMCQ+4 / −1

The de Broglie wavelength associated with an electron, accelerated by a potential difference of 81 V is given by:

  1. A
    13.6 nm
  2. B
    136 nm
  3. C
    1.36 nm
  4. D
    0.136 nm
View written solutionFree

Correct answer: D

$${\lambda _e} = {{12.27} \over {\sqrt V }}\mathop A\limits^o = {{12.27} \over {\sqrt {81} }}\mathop A\limits^o = {{12.27} \over 9}\mathop A\limits^o $$

$$ = 1.36\mathop A\limits^o $$ ($\because$ $$1\mathop A\limits^o = {1 \over {10}}$$ nm)

$ = 0.136$ nm

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