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difference between microscope and telescope in tabular form

Microscope and telescope are two optical devices and are used for different purposes.Microscope is an optical device which is used to see very small objects ( Unicellular organisms),While telescopes is an optical instrument which is used to see very large objects in space.More difference between microscope and telescope are given in the table below.  microscope and telescope comparison table   ...

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How does a Diffraction grating work?

“The diffraction grating is a useful device for analyzing light sources.It consists of a large number of equally spaced parallel slits.”Its working principle is based on the phenomenon of diffraction.The space between lines act as slits and these slits diffract the light waves thereby  producing a large number of beams which interfere in such a way to produce spectra. A ...

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What is difference between Reflection and refraction?

Reflection and refraction are two different properties of light. Reflection of light is the process in which light bounce back on striking the surface,while refraction of light is the process in which light changes its direction as it passes from one medium to another medium.     Reflection Vs Refraction Reflection Refraction When light falls from one medium on the ...

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What are some examples of refraction of light?

“The process of bending of light as it passes from air into glass and vice versa is called refraction of light.”Mirage,bent pencil in glass of water,rainbow,sunset are some examples of refraction of light. Why does refraction occur? If we dip one end of a pencil or some other object into water at an angle to the surface, the submerged part ...

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Do interference effects occur for sound waves?

Yes,interference effect occurs for sound waves despite of the fact that sound waves are longitudinal waves.When two sound waves of same frequency and same amplitude in the same direction superpose then the interference of sound waves occurs. For example two loudspeakers emit two harmonic sound waves of fixed frequency produced by an audio generator.When these waves combine at a point ...

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Why diffraction grating have closely spaced rulings?

A diffraction grating is a glass plate having a large number of close parallel equidistant slits mechanically ruled on it.A diffraction grating is used to study the diffraction effects of light. Since the phenomenon of diffraction is found to be prominent when the wavelength of light is large as compared with the size of the opening or aperture of the ...

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Image formation by convex and concave lens ray diagrams

 converging and diverging lenses ray diagrams In mirrors images are formed through reflection but lenses form images through refraction.This is explained with the help of ray diagrams as follows: Image formation by convex lens ray diagrams Image formation in convex lens can be explained with the help of three principal rays shown in figure. The ray parallel to the principal ...

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Uses and applications of total internal reflection

Total internal reflection

What is total internal reflection? When a ray of light travelling in denser medium enters into a rarer medium, it bends away from the normal. If the angle of incidence ‘i’ increases’ the angle of refraction ‘r’ also increases. For a particular value of the angle of incidence, the angle of refraction becomes 90°. The angle of incidence, that cause ...

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examples of total internal reflection

Total Internal Reflection One of the qualities of any optically transparent material is the speed at which light travels within the material, i.e., it depends upon the refractive index n of the material. The index of refraction is merely the ratio of the speed of light c in vacuum to the speed of light v in that material.Expressed mathematically: n=c ...

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difference between fresnel and fraunhofer diffraction in tabular form

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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