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Standard XII
Physics
Matter Waves
Question
The de-Broglie wavelength of a neutron at
927
0
C is
λ
. Its wavelength at
27
0
C is:
λ
2
λ
2
λ
4
λ
A
2
λ
B
λ
C
λ
2
D
4
λ
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Solution
Verified by Toppr
λ
=
h
√
2
m
K
T
T
1
=
927
+
273
,
T
2
=
27
+
273
=
1200
K
,
=
300
K
λ
α
1
√
T
∴
λ
1
λ
2
=
√
T
2
√
T
1
λ
1
λ
2
=
√
300
√
1200
λ
2
=
2
λ
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