## A doctor has prescribed a corrective lens of power +1.5 D. Find the focal length of the lens. Is the prescribed lens diverging or converging?

Q. 17 :- A doctor has prescribed a corrective lens of power +1.5 D. Find the focal length of the lens. Is the prescribed lens diverging or converging?   Answer:- Power…

## Find the focal length of a lens of power – 2.0 D. What type of lens is this?

Q. 16 :- Find the focal length of a lens of power – 2.0 D. What type of lens is this?    Answer:-   1 P = f 1 – 2.0…

## An object of size 7.0 cm is placed at 27 cm in front of a concave mirror of focal length 18 cm. At what distance from the mirror should a screen be placed, so that a sharp focussed image can be obtained? Find the size and the nature of the image.

Q. 15 :- An object of size 7.0 cm is placed at 27 cm in front of a concave mirror of focal length 18 cm. At what distance from the mirror…

## An object 5.0 cm in length is placed at a distance of 20 cm in front of a convex mirror of radius of curvature 30 cm. Find the position of the image, its nature and size.

Q. 14 :- An object 5.0 cm in length is placed at a distance of 20 cm in front of a convex mirror of radius of curvature 30 cm. Find the…

## The magnification produced by a plane mirror is +1. What does this mean?

Q. 13 :- The magnification produced by a plane mirror is +1. What does this mean?    Answer:- The magnification produced by a plane mirror is +1 implies that the image…

## An object is placed at a distance of 10 cm from a convex mirror of focal length 15 cm. Find the position and nature of the image.

Q. 12 :- An object is placed at a distance of 10 cm from a convex mirror of focal length 15 cm. Find the position and nature of the image.   …

## A concave lens of focal length 15 cm forms an image 10 cm from the lens. How far is the object placed from the lens? Draw the ray diagram.

Q. 11 : – A concave lens of focal length 15 cm forms an image 10 cm from the lens. How far is the object placed from the lens? Draw the…

## An object 5 cm in length is held 25 cm away from a converging lens of focal length 10 cm. Draw the ray diagram and find the position, size and the nature of the image formed.

Q. 10 : – An object 5 cm in length is held 25 cm away from a converging lens of focal length 10 cm. Draw the ray diagram and find the…