In Young's double slit experiment the tw...

In Young's double slit experiment the two slits 0.12 mm apart are illuminated by monochromatic light of wavelength 420 nm. The screen is 1.0 m away from the slits .
(a) Find the distance of the second (i) bright fringe , (ii) dark fringe from the central maximum .
(b) How will the fringe pattern change if the screen is moved away from the slits ?

7 mm

5.25 mm

6 mm

10 mm

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