Monochromatic laser light of frequency 5.20 × 1014 Hz is shown on a pair of thin parallel slits, and the pattern is viewed on a screen 1.20 m away
The fifth bright fringes (not counting the central fringe) occur at ±2.12 cm on either side of the central bright fringe. The entire apparatus is now immersed in a transparent liquid. When the experiment is repeated, the fifth bright fringes now occur at ±1.43 cm from the central bright fringe. (c = 3.00 × 108 m/s)
(a) How far apart are the slits?
(b) What is the index of refraction of the liquid?
(a) 0.163 mm (b) 1.48
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