Question

Select One Correct Option from the following: 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 surface 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
(A) 60 cm
(B) 70 cm
(C) 80 cm
(D) 90 cm.

Answer 1

c is correct option.
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Answer 2

Select One Correct Option from the following: 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 surface 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

(A) 60 cm

(B) 70 cm

✴️ (C) 80 cm

(D) 90 cm.