Power of a concave lens is - 12.5 D. What is the focal length of the lens?
in lenses of power + 4.5 D and -SD are placed in contact with each other.
power of the combination, (ii) focal length of the combination.
(ii) 2 m]
ver of a thin convex lens is +3.5 D. It is placed in contact with another
ch that the combined power is + 1.0 D. Calculate: i) power of second
focal length of the second lens.
0.4 m/
power and focal length of a combination of convex lens of loca
d concave lens of focal length 10cm.
161)
f focal length 40 cm is placed in contact with concave lens of
Calculate (i) power of the combination (ii) focal length of the