Physics
Study the diagram given below.
(a) Name the lens LL'.
(b) What are the points O and O' called?
(c) Complete the diagram to form the image of the object AB.
(d) State the three characteristics of the image.
(e) Name a device in which this action of lens is used.
Refraction Lens
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Answer
(a) LL' is a convex lens.
(b) The points O and O’ are called as first and second focal points.
(c) Completed diagram showing the formation of the image of the object AB is given below:
(d) The three characteristics of the image are magnified, virtual and upright.
(e) This action of lens is used in the magnifying glass.
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Related Questions
In each of the following cases, where must an object be placed in front of a convex lens so that the image formed is,
(a) at infinity,
(b) of same size as the object,
(c) inverted and enlarged,
(d) upright and enlarged?
Complete the following table —
Type of lens Position of object Nature of image Size of image Convex Between the optical centre and focus Convex At focus Concave At infinity Concave At any distance Study the diagram below.
(i) Name the lens LL'.
(ii) What are the points O and O' called?
(iii) Complete the diagram to form the image of the object AB.
(iv) State three characteristics of the image.
The following diagram in figure shows an object AB and a converging lens L with foci F1 and F2.
(a) Draw two rays from the object AB and complete the diagram to locate the position of the image CD. Also mark on the diagram the position of eye from where the image can be viewed.
(b) State three characteristics of the image in relation to the object.