1.

The wavelength of de-Broglie wave associated with a neutron of mass m at absolute temperature T is given by ……….. (here K is the Boltzman constant)

Answer»

`(h)/(sqrt(2mkT))`
`(h)/(sqrt(mkT))`
`(k)/(sqrt(3mkT))`
`(h)/(2sqrt(mkT))`

Solution :`(1)/(2)MV^(2)=(3)/(2)kT`
`THEREFORE m^(2)V^(2)=3mkT therefore mv=sqrt(3mkT)`
`therefore` de-Broglie wavelength ,
`lambda=(h)/(mv) therefore lambda=(h)/(sqrt(3mkT))`


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