1.

If electron, Hydrogen, Lithium and sodium nuclei are moving with the velocity of light, then the wavelengths associated with theseparticles are in the order?(A) Electron > Hydrogen > Lithium > Sodium(B) Electron > Sodium > Hydrogen > Lithium(C) Sodium > Lithium > Hydrogen > Electron(D) Electron > Lithium > Sodium > Hydrogen​

Answer»

Answer:

Explanation:

ACCORDING TO DEBROGLIE EQUATION

wavelength = H/mv

here v= VELOCITY of LIGHT

h = 6.63×10^-34

thus wavelength ∝ 1/mass

when mass increases wavelength decreases SINCE there are inversely proportion

according to increase in mass order is

electron < hydrogen < lithium < sodium

according to wavelength order

∴electron > hydrogen > lithium > sodium

thus answer is option A



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