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Suppose You Have Focused on a Screen the Image of Candle Flame Placed at the Farthest End of the Laboratory Table Using a Convex Lens. If Your Teacher Suggests You to Focus the Parallel Rays of the Sun, Reaching Your Laboratory Table, on the Same Screen, What You Are Expected to Do is to Move the - Science

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Suppose you have focused on a screen the image of candle flame placed at the farthest end of the laboratory table using a convex lens. If your teacher suggests you to focus the parallel rays of the sun, reaching your laboratory table, on the same screen, what you are expected to do is to move the:

(a) lens slightly towards the screen

(b) lens slightly away from the screen

(c) lens slightly towards the sun

(d) lens and screen both towards the sun

 

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Solution

(a) lens slightly towards the screen
To focus the parallel rays of the Sun, the lens should be slightly moved towards the screen.

Concept: Images Formed by Sperical Lenses
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