Pages

▼
Showing posts with label Physics. Show all posts
Showing posts with label Physics. Show all posts

Stimulated emission

›
The concept of stimulated emission was first put forward by Albert Einstein in 1917. Let us consider two energy levels E 1 and E...

Spontaneous emission

›
Let us consider two energy levels E 1 and E 2 in a material. For convenience, E 1 is taken to be the ground level. E 2 is greater ...

What is polorization

›
Light is electromagnetic in nature. The light is transverse in nature.  The vibration of the electric field and magnetic field are perpen...

What is diffraction

›
Diffraction : Diffraction is the bonding of light around an edge of the obstacle such as the edge of the slit we can diffraction of light...

Optical wavelength

›
What is Optical Wavelength? When there is a medium which has refractive index µ we have to use optical wavelength λ µ. The relation bet...

Electromagnetic spectrum definition

›
The electromagnetic waves can be characterised by the parameters like wavelength, frequency, phase and state of polarization. Wavele...

Wave optics Introduction

›
In a one-word optics can define that science of light. Light has dual nature sometimes it behaves like a wave and sometimes it behaves lik...

Coherence definition in physics

›
Coherence : If the phase difference between two waves or phase difference between two positions of the single wave remains constant, such...

Ruby Definition

›
Ruby : Ruby is synthetic aluminium oxide ( Al 2 O 3 ) with 0.05 weight of chromium oxide ( Cr 2 O 3 ) added to it. It is the chromium...

Application of laser

›
The main characteristics of laser radiation are following below. Coherence Very narrow bandwidth High directionality Extreme brightnes...