Question

19 (ii) If the powers of the lenses L, and L2 are in the ratio of 4:1, what would be the
ratio of the focal length of L1, and L2?
a) 4:1
b) 1:4
c) 2:1
d) 1:1
19 (iii) What is the formula for magnification obtained with a lens?
a) Ratio of height of image to height of object
b) Double the focal length.
c) Inverse of the radius of curvature.
d) Inverse of the object distance.​

Answer 1

Answer:

1:4

Explanation:

1:4 is the ratio of focal length