(a) Draw a diagram to show how a converging lens focusses parallel rays of light?
(b) How would you alter the above diagram to show how a converging lens can produce a beam of parallel rays of light.

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Solution

(a) When rays of light from a distant object pass through a converging lens, the light rays converge at the focus of lens (fig.).

(b) When rays of light come from the focus of lens, the emergent rays of light get parallel to the principal axis.

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(a) Draw a diagram to show how a converging lens focusses parallel rays of light? (b) How would you alter the above diagram to show how a converging lens can produce a beam of parallel rays of light.

(a) When rays of light from a distant object pass through a converging lens, the light rays converge at the focus of lens (fig.).(b) When rays of light come from the focus of lens, the emergent rays of light get parallel to the principal axis.

(a) Draw a diagram to show how a converging lens focusses parallel rays of light?
(b) How would you alter the above diagram to show how a converging lens can produce a beam of parallel rays of light.

(a) When rays of light from a distant object pass through a converging lens, the light rays converge at the focus of lens (fig.).

(b) When rays of light come from the focus of lens, the emergent rays of light get parallel to the principal axis.