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Atomic Structure
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de Broglie wavelength and uncertainty principle
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Single correct option
Difficulty 1 of 3
as111
If the speed of a moving electron is doubled while its mass stays the same, its de Broglie wavelength
A
remains unchanged
B
becomes double
C
becomes half
D
becomes one-fourth
Answer: C
Since
λ
=
h
/
(
m
v
)
, the wavelength is inversely proportional to speed. Doubling
v
halves
λ
.
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