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Easy
Question
Young’s double slit experiment is carried with two thin sheets of thickness 10.4 mm each and refractive index m1= 1.52 and m2 = 1.40 covering the slits S1 and S2 , respectively. If white light of range 400 nm to 780 nm is used then which wavelength will form maxima exactly at point O, the centre of the screen ?
- 416 nm only
- 624 nm only
- 416 nm and 624 nm only
- none of these
The correct answer is: 416 nm and 624 nm only
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