Question

If electron, Hydrogen, Lithium and sodium nuclei are moving with the velocity of light, then the wavelengths associated with these
particles 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 1

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

Answer 2

Answer:

The answer is a option A