Power of a Convex Lens of focal length 50 cm is
Which of the following lenses would you prefer to use while reading small letters found in a dictionary?
(a) A convex lens of focal length 50 cm
(b) A concave lens of focal length 50 cm
(c) A convex lens of focal length 5 cm
(d) A concave lens of focal length 5 cm
The focal length of a convex lens is 50 cm. What is its power?
the focal length of a convex lens is 100/3 cm and that of concave lens is 50/3 cm.find the power and focal length of this combination.