Question
Physics Question on Ray optics and optical instruments
Two thin convex lenses L1 and L2,have focal lengths 4 cm and 10 cm, respectively. They are separated by a distance of x cm as shown in the figure. A point source S is placed on the principal axis at a distance 12 cm to the left of L1. If the image of S is formed at infinity, the value of x is:
A
6
B
16
C
14
D
24
E
10
Answer
16
Explanation
Solution
Given :
focal length of L1 is 𝑓1=4 f 1=4 cm.