Quiz 2nd sec ( diffraction and refraction )

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In youngs douple slit experiment how can we increase the distance between the bright frings

In youngs douple slit experiment determine the value of the wave length if the distance between the two screens is 0.75 m and the distance between the two slits is 0.00015 and the distance between any two successive bright parts is 0.002 m calculate the value of the wavelength

In youngs douple slit experiment which of the following path difference can be used to obtain area with maximum amplitide

If the point of interferance is reached by the two waves having the same phase then this area of interferance will be

If the path difference at the first dark part after the central part is 0.5 m then the wavelenght equals