The diagram below shows a lens as a combination of a glass block and two prisms. - Noon Academy

The diagram below shows a lens as a combination of a glass block and two prisms.

Class 10 | ICSE | Physics | Refraction through a Lens | Selina

The diagram below shows a lens as a combination of a glass block 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 lens formed by this combination in a diagram is a convex lens.

(ii) The line XX’ is known as the principal axis.

(iii) The complete ray diagram is illustrated below

(iv) This point F is known as a focal point or focus.

i

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