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De Broglie wavelength of gas molecules or neutrons at a given temperature

This type of question, asked 2 times: 22 Apr 2025 S2, 12 May 2026 S2. All 2 questions below, oldest first.

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  1. Question 1

    22 Apr 2025 S2

    22
    The de-Broglie wavelength of a neutron at 27∘C27^{\circ}C is ' λ0\lambda_{0} '. What will be its wavelength at 927∘C927^{\circ}C ?

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  2. Question 2

    12 May 2026 S2

    144
    The ratio of de-Broglie wavelengths of molecules of hydrogen and helium which are at temperatures 27∘C27^\circ C and 127∘C127^\circ C respectively is (mHe=2mH2)(m_{He} = 2m_{H_2})

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