A 0.20 mm wide slit is illuminated by light of wave- length 420 nm. Consider a point P on a viewing screen on which the diffraction pattern of the slit is viewed, the point is at 30^(@) from the central axis of the slit. What is thc phase difference between the Huygens wavelets arriving at point P from the top and midpoint of the slit?

A 0.20 mm wide slit is illuminated by light of wave- length 420 nm.

1.	A 0.20 mm wide slit is illuminated by light of wave- length 420 nm. Consider a point P on a viewing screen on which the diffraction pattern of the slit is viewed, the point is at 30^(@) from the central axis of the slit. What is thc phase difference between the Huygens wavelets arriving at point P from the top and midpoint of the slit?
Answer» SOLUTION :`0.09 PI RAD = 17^(@)`

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