Question

In Young's double slit experiment the separation d between the slit is 2mm, the wavelength λ of the light used is 5896Ao and distance D between the screen and slits is 100 cm. It is found that the angular width of the fringes is 0.20o. To increase the fringe angular width to 0.21o ( with same λ and D ) the separation between the slits needs to be changed to

Answer 1

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