Question

a student is to find the focal length of concave mirror and convex lens​

Answer 1

Answer:

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Answer 2

Explanation:

To determine the focal length of a mirror the formula used is as follows -

  $\frac{1}{f}=\frac{1}{v} + \frac{1}{u}$

where ,

f = focal length of the mirror

v = distance of object from principle ,

u = distance of image from principle .

Hence , by substituting the respective values of u and v , the focal length can be calculated .

To determine the  focal length of a lens the formula used is as follows -

$\frac{1}{f}=\frac{1}{v} - \frac{1}{u}$

where ,

f = focal length of the lens

v = distance of object from principle ,

u = distance of image from principle .

Hence , by substituting the respective values of u and v , the focal length can be calculated .

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