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Question

The diagram alongside shows a lens as a combination of a glass slab and two prisms.

(i) Name the lens formed by the combination.

(ii) What is the line XX' called ?

(iii) Complete the ray diagram and show the path of the incident ray AB after passing through the lens.

(iv) The final emergent ray will either meet XX' at a point or appear to come from a point on XX'. Label the point as F. What is this point called ?


Solution

(i) The combination forms a convex lens.
(ii) XX' is known as the principal axis.
(iii)

(iv) The point F is called the second focus.


Physics
Concise Physics
Standard X

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