Question

chosse the correct answer
power of lens is mentioned as -2.0D then the type and focal length are,
a) convex,0.5 m
b) concave,2 m
c) convex,2 m
d) concave, 0.5 m​

Answer 1

Answer:

b) concave.................................

Answer 2

Answer:

concave len of 0.5m

Explanation:

power of concave len is always negative.

P=1/f

-2 = 1/f

f = 1/2

f = 0.5m