Question

focal length of a convex lens is
75cm. what is power of lens.
a) +2D b) +1.33D c) -2D d) -1.33D ​

Answer 1

Answer:

b) +1.33D

Explanation:

Power of convex lenght=100f(cm)

then, 75cm of lenght power is

=100/75= +1.33D

Answer 2

Answer:

B) +1.33D

Explanation:

power convex lens = 100/f(cm) = 100/75 = +1.33D