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

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Thinking process de Broglie wavelengfth associated with a moving particle can be given as <br> `lambda=h/pr=(h)/(sqrt(2m(KE))` <br> At thermal equilibrium, temperature of neutron and heavey water will be same . <br> This commo n temp[erature is given as T. <br> Also, we know that, kinetic energy of a particle <br> `KE=(p^(2))/(2m)` <br> where,P = momentum of the particle <br> m=mass of the particle <br> Kinetic energy of the neutron is <br> `KE=(3)/(2)KT` <br> `therefore` de-Broglie wavelength of the neutron <br> `lambda=h/p=(h)/(sqrt(2m(KE))=(h)/(sqrt(2mxx(3)/(2)kT))=(h)/(sqrt(3mKT))`**Properties Of Photon**

**Photon Counts Emitted By A Source Per Second**

**Photon Flux**

**Photon Density In A Light Beam**

**Force Exerted By A Light Beam On A Surface**

**The Whole Amount Of Radiation Falling On The Surface Is Absorbed By The Surface**

**The Whole Amount Of Radiation Falling On The Surface Is Reflected By The Surface**

**When Some Part Of Radiation Is Absorbed And Remaining Part Is Reflected**

**De Broglie Wavelength Associated With Charged Particle**

**De Broglie Wavelength Associated With Uncharged Particle**