(11) A girl was playing with a thin beam of light from a laser torch by directing it
from different directions on a convex lens held vertically. She was surprised to see
that in a particular direction, the beam of light continues to move along the same
direction after passing through the lens. State the reason for her observation. Draw a
ray diagram to support your answer.
OR
Answers
A girl was playing with a thin beam of light from a leser torch by directing it from different directions on a convex lens held vertically.
she was surprised to see that in a particular direction, the beam of light continues to move along the same direction after passing through the lens.
solution : we know, when a ray of light passing through the optical centre of lens, it never deviates from its path. it continues to move along the same direction after passing through it.
so she must have directed the beam of light along the direction of the optical centre of the lens.
see diagram to support our answer.
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