JEE Advanced | 2015Basic Maths and Units and DimensionsHard
Question
Two identical glass rods S1 and S2 (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 S1 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 S2. The distance d is :


Options
A.60 cm
B.70 cm
C.80 cm
D.90 cm
Solution

For first surface
V = 50 cm
for second surface
d = 70 cm
∴ (B)
Create a free account to view solution
View Solution FreeTopic: Basic Maths and Units and Dimensions·Practice all Basic Maths and Units and Dimensions questions
More Basic Maths and Units and Dimensions Questions
A system goes from A to be via two process I and II as shown in internal engies in the process I and II respectly y, the...Dimension′s of σ2/2 ∈0 are equal to :-...If the capacitance of a nanocapacitor is measured in terms of a unit ′u′ made by combining the electronic ch...Two Polaroids P1 and P2 are placed with their axis perpendicular to each other. Unpolarised light I0 is incident on P1 ....Two wires are made of the same material and have the same volume. The first wire has cross-sectional area A and the seco...