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Q.

A parallel beam of monochromatic light  of wavelength λ falls normally onto  a single slit of width 6λ.The angle for which the third diffraction minima of light is observed is

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a

300

b

sin-116

c

900

d

sin-123

answer is A.

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Detailed Solution

in single slit diffraction pattern angular position of third minimum i sinθ =3λa, sinθ  =3λ6λ=12, θ=300
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