Chapter 09 Light – Reflection and Refraction Questions-04
QUESTIONS
1. Define 1 dioptre of power of a lens.
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#missing2. A convex lens forms a real and inverted image of a needle at a distance of 50 cm from it. Where is the needle placed in front of the convex lens if the image is equal to the size of the object? Also, find the power of the lens.
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#missing3. Find the power of a concave lens of focal length 2 m.
