Wave Nature of Light

A scientist called De Broglie proposed that matter can behave as wave as well as particles. He suggested that a particle of mass, m, moving with a velocity, v, would possess a wavelength λ, of

λ= \( \frac {h}{mv} = \frac{h}{p} \)

h – Plank’s constant

p – momentum p = mv

This wavelength is called De Broglie wavelength.

Plank’s Theory

This reveals that radiations are emitted in discrete packs or packets of energyEnergy is the ability to do work. Energy exists in several forms such as heat, kinetic or mechanical energy, light, potential energy, and electrical energy. Units of Energy: The SI unit... More known as quanta.

E = hf

λ= \( \frac{hc}{\lambda} \)

c – Speed of light

h – Plank’s constant

f- frequency of radiation

λ = wavelength of radiation