Question

what are matter waves derive an expression for deBroglies wavelength​

Answer 1

This is your ANSWER HOPE it is HELPFUL to you

Answer 2

Answer:

Matter-wave is the wave associated with matter

The matter-wave is a superposition of a lot of waves, which constructively interfere where the matter present

Explanation:

• Matter-wave is the wave associated with matter

• The matter-wave is a superposition of a lot of waves, which constructively interfere where the matter present

• When the matter is moving with velocity sometimes it acts as a particle or a wave

We have the condition for allowed orbits as the allowed orbits have  the circumference equal to the integral multiple of the wavelength, that is

$2\pi r=n$λ (equation 1)

also, angular momentum is $L=r*p=nh/2\pi$ (equation 2)

from equation 1

$r=\frac{n}{2\pi }$ λ

put the value in equation 2

$\frac{n}{2\pi }$ λ $*p$$=nh/2\pi$

⇒ λ =$h/p$

where Planck's constant $h=6.6*10^{-34}$

$p$- the momentum of the particle ($p=mv$)