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What is focal point

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What is focal point
  • 3 answers

Ajay Gill 5 years, 7 months ago

It is a point on principal axis where light rays originating from a point on the object converge . It is a point onto which collimated light rays parallel to the axis are focussed.

Abhay Singh 5 years, 7 months ago

Ok understood ....

Abhay Singh 5 years, 7 months ago

The point where all rays parallel to principle axis meet ( case of concave ) or appear to meet (case of covex).if known as focal point or focus.....
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