In Young.s double slit experiment the separation d between the slits is 2mm, the wavelength lambda of the light used is 5896 A^(0) and distance D between the screen and slits is 100 cm. It is found that the angular width of the fringes is 0.20^(0). To increase the fringe angular width to 0.21^(0) (with same lambda and D) the separation between the slits needs to be changed to

In Young.s double slit experiment the separation d between the slits i

1.	In Young.s double slit experiment the separation d between the slits is 2mm, the wavelength lambda of the light used is 5896 A^(0) and distance D between the screen and slits is 100 cm. It is found that the angular width of the fringes is 0.20^(0). To increase the fringe angular width to 0.21^(0) (with same lambda and D) the separation between the slits needs to be changed to
Answer» `1.8mm` `1.9 MM` `1.7 mm` `2.1mm` ANSWER :B

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