alleryThe de Broglie wavelength of a fast electron is comparable with:
ARadio wavelengths
BSound wavelengths
COcean wavelengths
DX-ray wavelengths
Answer & Solution
Correct answer: D. X-ray wavelengths
1. An electron's momentum is large for its mass.
2. A large momentum means a very short wavelength.
3. It comes out comparable with X-ray wavelengths.
4. So the answer is X-ray wavelengths.
_Source: syllabus Physics, Ch 11 'Dual Nature of Radiation and Matter'_
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