Find the typical de Broglie wavelength associated with a He atom in helium gas at room temperature `(27 ""^(@)C)` and 1 atm pressure.

Find the typical de-Broglie wavelength associated with a He atom in helium gas at room temperatuare (27^@C) and 1 atm pressure and compare it with the mean separation between two atoms under these conditions.

Find the typical de-Broglie wavelength associated with a H-atom in helium gas at room temperature (27^(@)C) and 1atm pressure, and compare it with the mean separation between two atom under these conditions.

Find the typical de-Broglie wavelength associated with a H-atom in helium gas at room temperature (27^(@)C) and 1atm pressure, and compare it with the mean separation between two atom under these conditions.

Obtain the de Broglie wavelength associated with thermal neutron at roon temperature 30^(@)C .

Obtain the de Broglie wavelength associated with thermal neutrons at room temperature (27^(@)C) . Hence explain why a fast neutron beam needs to be thermalised with the environment before it can be used for neutron diffraction experiments .

Obtain the de-Broglie wavelength associated with thermal neutrons at room temperature (27^@C) . Hence explain why a fast neutron beam needs to be thermalized with the environment before it can be used for neutron diffraction experiments.