Question

sign convention for concave and convex lens​

Answer 1

hello bro

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here is ur answer

for concave lens

1)-f=-ve

2)-u=-ve

3)-v=always -ve

4)-ho= +ve

5)-hi=always +ve

for convex lens

1)-f=+ve

2)-u=-ve

3)-v=if image is real then +ve and if virtual then -ve

4)-ho= +ve

5)-hi=if real then -ve and if virtual then +ve

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Answer 2

1. the measures are taken from the optical centre

2. distances in the direction of the incident ray are positive

3. distances against the direction of the incident ray are negative

4. focal length of concave lens is negative

5. focal length of the convex lens is positive