PG entrance exam CUET PG 2025 Mock Test Physics Optics Diffraction

A plane wavefront of 7000 Å falls on an aperture. The area of half period zone of the diffraction pattern on screen 1 meter away from the aperture will be :

1
28 × 10-7 m2
2
44 × 10-7 m2
3
22 × 10-7 m2
4
14 x 10-7 m2
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