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Question

The de-Broglie wavelength of a neutron at 9270C isλ. Its wavelength at 270C is:
  1. λ2
  2. λ
  3. 2λ
  4. 4λ

A
2λ
B
λ
C
λ2
D
4λ
Solution
Verified by Toppr

λ=h2mKT
T1=927+273 , T2=27+273
=1200 K , =300 K
λα1T
λ1λ2=T2T1
λ1λ2=3001200
λ2=2λ

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