What is the focal length of a lens when it bounded by two spherical surfaces curved inwards?
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The focal length of concave lens is always
POSITIVE... xd
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The focal length of a lens which is found by two spherical surfaces in words is always positive.
Explanation:
- If the two surfaces of the the lens is towards the in what direction then it is a convex lens.
- A concave lens has this focal length as negative and a convex lens has a focal length which is always positive in nature. A convex lens is also known as converging lens because it is used to convert the release of alight from infinity at a given point.
To know more about convex lens,
a convex lens of focal length is 10 centimetre calculate its power ...
https://brainly.in/question/14838578
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