In Fresnel.s diffraction wavefront must ...

In Fresnel.s diffraction wavefront must be

spherical

cylindrical

plane

both 1 and 2

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Consider the following statement A and B and identify the correct answer A) Fresnel.s diffraction pattern occurs when the source of light or the screen on which the diffraction pattern is seen or when both are at finite distance from the aperture B) Diffraction light can be used to estimate the helical structure of nucleic acids

Wavefront means

In Fresnel's class of diffraction the

List-I List-II a) Fresnel's diffraction e) Bright band b) Fraunhofer's diffraction f) Source and screen are at finite distance c) In interference phase difference is even multiple of pi g) Dark band d) In interference phase difference is odd multiple of pi h) Source and screen are at infinite distance

In a single slit diffraction pattern

All fringes of diffraction are of-

In a single slit diffraction experiment, the width of the slit is made double its original width. Then the central maximum of the diffraction pattern will become

The average path difference between two waves coming from third and fifth fresnel zones of a wave front at the centre of the screen is

A light of wavelength 1 is incident on an object of size b. If a screen is at a distance D from the object, identify the correct condition for the obervation of different phenomena a) if b^(2) = D1 , Fresnel diffration is obserbed b) if b^(2) gt gt D1 , Fraunhofer diffraction is obserbed c) if b^(2) lt lt D1 , Fraunhofer diffraction is obserbed d) if b^(2) gt gt D1 , the approximation of geometrical optics is applicable

Show graphically the intensity distribution in Fraunhofer.s single slit diffraction experiment. Label the axes.

AAKASH SERIES-WAVES OPTICS-EXERCISE -IA (DIFFRACTION)

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