Question
 The radii of curvature of the faces of a double
convex lens are 20 cm and 30 cm. If focal length of the lens is 36 cm find the refractive index of the material of the lens?Solution
The correct answer is C
More Physics GS Questions
- Find the wrong number in the given number series.
17, 28, 21, 32, 25, 45 120, 240, 80, 320, 60, 384
15, 30, 30, 20, 10, 8
121, 240, 386, 555, 751, 976
225, 45, 450, 90, 900, 150, 1800
360, 322, 286, 248, 220, 190
Find the Wrong number in the given number series.
3, 6, 2, 8, 2.4, 9.6
21, 23, 27, 35, 51, 87Â
12, 3.6, 18, 0.72, 0.432, 0.3024
39, 43, 59, 95, 159, 281
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