Q4:-Two points P and q are situated at the same distance from a source of light but on opposite sides. The plane difference between the light waves passing through P and q will be:
Anonymous Quiz
12%
(a) n
33%
(b) 2n
32%
(c) π/2
24%
(d) zero
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Q5:-When a ray of light (white) enters a lens, undergoes a change is:
Anonymous Quiz
24%
(a) wavelength
19%
(b) velocity
16%
(c) frequency
41%
(d) both velocity and wavelength
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