(a) The ray diagram given below illustrates the experimental set-up for the determination of the focal length of a converging lens using a plane mirror.

(i) Write two characteristics of the image Formed.
(ii) What is the name given to the distance between the object and optical centre of the lens in the above diagram?
(b) The given figure shows an object O as its image I. Copy the diagram and draw suitable rays to locate the lens and focus. Name the type of lens in this cases

[5 MARKS]

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Solution

part a: 2 Marks
part b: 3 Marks

(a)
(i) The image formed is real, inverted and of same size as that of object.
(ii) The distance between the object and the optical centre of the lens in the given diagram is focal length.
(b) The complete ray diagram is shown below.

A convex lens is used in this case.

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Similar questions

The diagram in below figure shows the experimental set up for the determination of 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 lense.

(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?

The ray diagram given below illustrates the experimental set up for the determination of the focal length of a converging lens using an auxiliary mirror:

The distance between the object and optical centre of the lens is

The ray diagram given below illustrates the experimental set up for the determination of the focal length of a converging lens using an auxiliary mirror:

Two characteristics of the image formed are

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