Physics
Describe how you would determine the focal length of a converging lens, using a plane mirror and one pin. Draw a ray diagram to illustrate your answer.
Related Questions
How will you differentiate between a convex and a concave lens by looking at (i) a distant object and (ii) a printed page?
Draw a neat labelled ray diagram to show the formation of an image by a magnifying glass. State three characteristics of the image.
Describe in brief how would you determine the approximate focal length of a convex lens.
The diagram in figure shows experimental setup for determination of the focal length of a lens using a plane mirror.
(i) Draw two rays from the point O of the object to show the formation of image I at O itself.
(ii) What is the size of the image I?
(iii) State two more characteristics of the image I.
(iv) Name the distance of the object O from the optical centre of the lens.
(v) To what point will the rays return if the mirror is moved away from the lens by a distance equal to the focal length of the lens?