Question

Q3. If a convex lens of focal length 75 cm and
a concave lens of focal length 50 cm are
combined together, What will be their
resulting power?
a) +6.6 D
b) 0.66 D
c) -6.6 D
d) -0.66 D
0000​

Answer 1

Answerb

(b) 0.66D

It can't neither positive nor negative since it is combined..

Hope it helped..

Answer 2

Answer:

d) -0. 66D

Explanation:

hope it helps you...