Optics 6 Question 12
14. In a Young’s double slit experiment, slits are separated by 0.5 and the screen is placed away. A beam of light consisting of two wavelengths, and , is used to obtain interference fringes on the screen. The least distance from the common central maximum to the point where the bright fringes due to both the wavelengths coincide, is
(a)
(b)
(c)
(d)
(2017 Main)
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Solution:
- Let
th bright fringes coincides, then
Hence, distance from the central maxima is