Young’s double slit experiment derivation
One of the first demonstration of the intererference of light waves was given by Young – an English physicist in 1801. We have learnt that two essential conditions to obtain …
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 using plano-convex lenses. By using two convergent lenses separated …
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 very close to the principal axis and each point object …
Combination of Lenses
Suppose we have two lenses of focal lengths f1 and f2 separated by a distance x as shown in fig below. L1, L2 correspond to the position of two lenses …
Translation Matrix
The matrix Tm is called Translation Matrix. The matrices can be used to find the position of the final image. The method of writing linear equations for the coordinates of …
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 to another point which takes the minimum (i.e least) time. …
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. is known as optics. Optics is classified into two categories: …
Huygens principle of secondary wavelets
Huygens principle of Wave Theory Huygens Principle helps us to find the position of a given wavefront at any instant if we know its present position. A wavefront is defined …
Michelson Interferometer- Definition, Principle, Construction and Working, Applications.
An interferometer is an instrument that uses interference phenomenon in the measurement of the wavelength of light in terms of standard of length or the measurement of distance in terms …
Read moreMichelson Interferometer- Definition, Principle, Construction and Working, Applications.