Physics-
General
Easy
Question
Two identical glass rode 
and 
(refractive index = 1.5) have one convex end of radius of curvature 10 cm. They are placed with the curved surfaces at a distance d as shown in the figure, with their axes (shown by the dashed line) aligned. When a point source of light P is placed inside rod on its axis at a distance of 50 cm from the curved face, the light rays emanating from it are found to be parallel to the axis inside . The distance d is
- 60 cm
- 70 cm
- 80 cm
- 90 cm
The correct answer is: 70 cm
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