Question

For reading small letters, which type of lens will be suitable?
Convex lens of focal length 70 cm
Concave lens of focal length 70 cm
Convex lens of focal length 8 cm
Concave lens of focal length 8 cm​

Answer 1

Answer:

Convex lence of focal length 70 cm

Answer 2

Answer:

5 cm

Explanation:

becuase a convex lens gives a magnifined imange of an object when it is placed between the radius of curvature and focal length also magnification is more for convex lenses having shorter focal length it is the reason that we have to use the 5cm length lenses to read small letters