Question

Which one of the following explains light both as a stream of particles and as wave motion

• A. Diffraction
• B.
• C. Interference
• D. Photoelectric effect

Answer 1

The correct option is B

Let me tell you something.We know ,$E=m{c}^2$ [From Einstein]

$\&E=hv$ [from Plank]

Now , De-Broglie thought that if

$\to$ Energy is related to mass

$\to$ Energy is related to frequency.

Then, There should be a relation between mass and frequency.

The, He gave what we call now as De-broglie wavelenght

$\Rightarrow$ m$c^2$ = $\frac{hc}{\lambda }$

$\Rightarrow$ m$c^2$ = $\frac{hv}{\lambda }$

$\Rightarrow$ $\lambda$ = $\frac{h}{mv}$ $\Rightarrow$ $\lambda$ = $\frac{h}{p}$

This equation explain both wave as well as particle nature because both wavelenght and momentum is involved.

$\Rightarrow$Differaction $\to$ Explains wave nature

$\Rightarrow$Interference $\to$ Wave Nature

$\Rightarrow$Photoelectric effect $\to$ Particle nature

So,option(b) is correct