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Byju's Answer
Standard X
Physics
Sign Convention for Ray Diagram
Define focal ...
Question
Define focal length?
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Solution
Focal Length:
The distance between the concave mirror and the focal point of the mirror is called the
focal length
f
.
It is the point where parallel rays of light meet or converge.
The focal length varies with the sign (positive or negative) depending upon the nature of the mirror (concave or convex).
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