Question

Which of the following explains the particle like nature?

• A. Black Body Radiation
• B. Photoelectric effect
• C. Diffraction
• D. None of these

Answer 1

Answer: (A), (B)

The correct options are
A

Black Body Radiation

B

Photoelectric effect

The particle nature of the electromagnetic spectrum explains following properties.

a) Black Body Radiation $\to$ Planck used the assumption of quantum theory, that energy comes in discrete chunks called photons, to explain Black Body Radiation.

b) Photoelectric effect $E=h\nu$ $\to$ Einstein used Planck's quantum theory and applied it to explain photo electric effect.
$KE=h\nu -W$
$KE=h\nu -h{\nu }_0$

$\Rightarrow$ On the other hand, diffraction explains the wave nature of light.