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differentiate between real and virtual focus?

Asked by 1st March 2013, 6:31 PM
Answered by Expert
Answer:
The focus where the parallel light rays coming from a far object, parallel to each other and to principle axis converge actually is called real focus and when it diverge but appears to converge if rays are extended back is called virtual focus.
Answered by Expert 13th March 2013, 1:11 AM
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