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CBSE Class 10 Answered

ONE HALF OF A CONVEX LENS OF FOCAL LENGTH20CM IS COVERED WITH A BLACK PAPER
Asked by | 13 Jul, 2008, 07:37: PM
answered-by-expert Expert Answer

this is because light will go only form the upper half of the lens not from the lower part of the lens which is covered.

Answered by | 14 Jul, 2008, 11:20: AM

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