Optics 6 Question 57
59. A beam of light consisting of two wavelengths,
(a) Find the distance of the third bright fringe on the screen from the central maximum for wavelength
(b) What is the least distance from the central maximum where the bright fringes due to both the wavelengths coincide?
The distance between the slits is
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Solution:
- (a) The desired distance will be
(b) Let
Therefore, 4th bright of
