NEET Questions Solved

NEET - 2017

The de-Brogile wavelength of a neutron in thermal equilibrium with heavy water at a temperature T (Kelvin) and mass m, is 





(b) Thinking Processs de-Brogile wavelength associated with a moving particle can be given as 


At thermal equilibrium,temperature of neutron and heavy water will be same. This common temperature is given as, T. Also, we know that, kinetic energy of a particle 


    where, p=momentum of the particle 

 m=mass of the particle

Kinetic energy of the neutron is 


  de-Brogile wavelength of the neutron 



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