Laser Physics
Spontaneous Emission and Stimulated Emission
When light of suitable frequency incident on the substance, the atom of the substance go to the excited states by…
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Laser Physics
What is Temporal Coherence
Coherence is the term used to describe the phase correlation phenomenon between two waves with respect to time or space.…
Laser Physics
3 main Components of Laser
The term Laser is an acronym for Light Amplification by Stimulated Emission of Radiation. There are main 3 components of…
Laser Physics
Properties of Photon
Before study the properties of photon we must have to know some basic introduction of photon. In 1905, Einstein explained…
Geometrical Optics
Methods of Reducing Spherical Aberration
How to Reduce Spherical Aberration The following 5 methods are usually used to reduce the spherical aberration. By Stop Method.By…
Geometrical Optics
Aberration in Optics and Types of Aberration
Aberration in Optics In the simple theory of image formation by lenses, it is assumed that an object is situated…
Geometrical Optics
Combination of Lenses
Suppose we have two lenses of focal lengths f1 and f2 separated by a distance x as shown in fig…
Geometrical Optics
Translation Matrix
The matrix Tm is called Translation Matrix. The matrices can be used to find the position of the final image.…
Geometrical Optics
Fermat’s Principle of Least Time
What is fermat's principle? This principle states that the light always travels that path in a medium from one point…
Geometrical Optics
Optical Path and Geometrical Path
The branch of physics which deals with the study of optical phenomenon like reflection, refraction, dispersion, interference, diffraction, polarization etc.…