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Acids, Bases And Salts

Question
CBSEENSC10014843

By using a convex lens, a student obtained a sharp image of his class-room window grill on a screen. In which direction should he move the lens to focus a distant tree instead of the grill?

  • Towards the screen

  • Away from the screen

  • Very far away from the screen

  • Behind the screen

Solution

A.

Towards the screen