1.

A parallel beam of light falls on a converging lens. Which diagram shows what happens to the beam of light?

Answer»

Explanation:

the rays all CONVERGE at FOCUS , i.e, at 20cm from lens (10CM from screen)

now the length of side be s

RATIO of sides =ratio of distance of focus from lens to the distance of focus

from screen

s

1

=

10

20

s=0.5cm, and the image is inverted, hence option D is correct



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