1.

A convex lens of focal length 20 cm is placed in contact with a concave lens of focal length 40 cm. Calculate the : (a) Power of each lens (b) Power of resulted lens (c) Nature of resulted lens (d) Focal length of the resulted lens [5 MARKS]

Answer» A convex lens of focal length 20 cm is placed in contact with a concave lens of focal length 40 cm. Calculate the :
(a) Power of each lens
(b) Power of resulted lens
(c) Nature of resulted lens
(d) Focal length of the resulted lens
[5 MARKS]


Discussion

No Comment Found