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difference between fresnel and frounhofer diffraction

what is Fresnel’s diffraction? Fresnel diffraction can be observed if the source of light and the screen at which diffraction pattern is formed are kept at finite distance from the diffracting obstacle.In this situation the wave fronts falling on the obstacle are not plane.Similarly the wave fronts leaving the obstacle are not plane. what is Fraunhofer diffraction? Fraunhofer diffraction can ...

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difference between microscope and telescope

Difference table between microscope and telescope:     Microscope      Telescope                                                                                                 ...

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Difference between interference and diffraction

Interference of light: The modification in the distribution of light energy due to superposition of two or more waves is called interference of light. Conditions for interference: Light source should be monochromatic. Light source should be coherent mean they should not be independent but should be subsidiary source and derived from a single source. The light source should be narrow ...

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newton’s rings experiment with animation

Newton’s Ring: Newton’s rings is a process in which Circular bright and dark fringes obtained due to air film enclosed between a Plano convex lens and a glass plate. An air wedge film can be formed by placing a plano-convex lens on a flat glass plate.The thickness of film is zero where the lens and the plate are in contact ...

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Difference between constructive and destructive intereference

 What is interference? Interference of light is defined as:”When two or more light waves having same frequency,same wavelength and same amplitude meet together in a medium at a point,they cancel or enhance the effect of each other at that point.This phenomenon is called interference of light waves.” Types of interference: There are two types of interference of light. Constructive interference ...

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Diffraction grating experiment

What is diffraction? “The bending of light waves around the corners of an opening or obstacle and spreading of light waves into geometrical shadow is called diffraction.”Diffraction effect depends upon the size of obstacle.Diffraction of light takes place if the size of obstacle is comparable to the wavelength of light.Light waves are very small in wavelength,i.e,from 4×10-7 m to 7 × 10 -7 m.If ...

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Fiber optic communication

Introduced to Fibre Optics: For hundreds of years man has communicated using flashes of reflected Sunlight by day and lanterns by night.Navy signalmen still use powerful blinker lights to transmit coded massages to other ships during periods of radio-silence. Light communication has not been confined to simple dots and dashes. It is an interesting but little known fact that Alexander ...

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Difference between Concave mirror and convex Mirror

What are Spherical Mirrors? A mirrors whose polished, reflecting surface is a part of a hollow sphere of glass or plastic is called a spherical mirror. In a spherical mirror, one of the two curved surface is coated with a thin layer of silver followed by a coating of red lead oxide paint. Thus, one side of the spherical mirror ...

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Refraction of light

What is Refraction of Light? Refraction of light is defined as:”The process of bending of light as it passes from air into glass and vice versa is called refraction of light.” If we dip one end of a pencil or some other object into water at an angle to the surface, the submerged part looks bent. Its image is displaced ...

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Difference between convex and concave lens

What are Lenses? “Lens is a piece of transparent material of which one or both sides are  spherical.”It is any transparent material having two surfaces, of which at least one is curved. Lenses refract light in such a way that an image of the object is formed.Each surface of a lens is a part of a sphere.The centre of that ...

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