Define the principal focus of a …

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Define the principal focus of a concave length

Posted by Riya Choudhary Choudhary 5 years, 4 months ago

CBSE > Class 10 > Science

2 answers

Rohit Joshi 5 years, 4 months ago

Ans. Principal focus of a concave mirror is the point on its principal axis, where light rays coming parallel to principal axis actually converge after reflection from mirror.

1Thank You

Gaurav Seth 5 years, 4 months ago

Principal focus of Concave lens:

‘The concave lens’ is the diverging lens.
When the “parallel rays of light” passes through the concave lens where the ‘refracted rays diverge’ so that they can appear to come from a single point called “the principal focus”.
There is some distance between “the principal focus” and “the centre of the lens”, which is called ‘the focal length’.

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Posted by Pandey Ji 5 months, 3 weeks ago

CBSE > Class 10 > Science