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Playing with an old lens , …

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Playing with an old lens , Ravi discovers that if he holds the lens 10 cm away from a wall opposite to a window , he can see a sharp but upside-down picture of outside world on the wall. That evening , he covers a lightex lamp with a piece of opaque paper on which he has pierced, a small hole 1mm in diameter. By placing the lens between the illuminated card and the wall, he manages to produce a sharp image of diameter 5mm on the wall . What is the power of the lens

Posted by Vansh Vijayvargiya 4 years, 11 months ago

CBSE > Class 10 > Science

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