The focal length of a convex lens is 10 cm.Find its magnifying power when it is used as a magnifying glass to form the image at (i) near point and (ii) far point

The focal length of a convex lens is "10cm.Find its magnifying power when it is used as a magnifying glass to form the image at (i) near point and (ii) far point

The focal length of a converging lens is 8 cm. Fins the magnification power when it is used as a reading lens to form the image at near point.

A telescope has an objective of focal length 200 cm and eyepiece of focal length 5 cm. Calculate its magnifying power when the final image is formed (a) at infinity and (b) at distance of distinct vision.

" If the focal length of a magnifier is "5cm" calculate,the magnifying power of the lens for relaxed eye "

Calculate the focal length of a lens used as simple microscope of magnifying power 20. Consider that the final image is formed at the least distance of distinct vision.

A convex lens is of focal length 10 cm. What is its power?