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(a) What is a wave front?How does it pro...

(a) What is a wave front?How does it propagate?Using Huygens' principle,explain reflection of a plane wavefront from a surface and verify the laws of reflection. (b) A parallel beam of light of wavelength 500 nm falls on a narrow slitand the resulting diffraction pattern is obtained on a screen 1 m away.If the first minimum is formed at a distance of 2.5 mm from the centre of screen,find the (i)width of the slit, and (ii) distance of first secondary maximum from the centre of the screen.

A

10 cm

B

24 cm

C

30 cm

D

15 cm

Text Solution

Verified by Experts

The correct Answer is:
B
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