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प्रश्न
How would you alter the above diagram to show how a converging lens can produce a beam of parallel rays of light.
उत्तर
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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संबंधित प्रश्न
A converging lens of focal length 5 cm is placed at a distance of 20 cm from a screen. How far from the lens should an object be placed so as to form its real image on the screen?
Which type of lens is :
a converging lens, and which is
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