Two identical glass rods S 1 and S 2 (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 S 1 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 S 2 . The distance d is
Text Solution
Verified by ExpertsB
For Ist refraction
v = 50 cm
For IInd refraction
x = 20 cm
d = 70 cm
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