Question

Q10.
Newton's rings are obtained with reflected light of wavelength 5000 A . If the
radius of curvature of the lens is 125cm, the diameter of the 50th dark ring is
(Given u =1)
0.56 cm
2.8 cm
0.06 cm
1.12 cm
Option A:
Option B:
Option C:
Option D
O Option A
O Option B
us
O Option c
O Option D​

Answer 1

Two coherent sources of intensity 10 w/m2 and 25 w/m2 interfere to from fringes. Find the ratio of maximum intensity to minimum intensity.

[May 2004, Set No. 1; May 2003, Set No. 2]

Sol: We know the intensity (I) = a2 [square of amplitude]

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Ratio of Imax to Imin is

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