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Laser light of wavelength passes through a thin slit of thickness and produces its first dark fringes at angles of +-45 DEGREES with the original
Laser light of wavelength passes through a thin slit of thickness and produces its first dark fringes at angles of +-45 DEGREES with the original direction of the beam. The slit is then reduced in size to a circle of diameter a. When the same laser light is passed through the circle, the first dark fringe occurs at
A) +- 59.6 DEGREES
B) +-54.9 DEGREES
C) +- 36.9 DEGREES
D) +-35.4DEGREES
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