Physics, asked by Fghi7045, 1 day ago

Why do we have to find a rough focal length

Answers

Answered by textbooksolutions6

Answer:

The rough focal length of convex lens is obtained by forming the sharp image of very distant object on screen.

Explanation:

The focal length of a concave mirror can be found using these method we can put an object far away from the concave mirror and place a screen to obtain the image formed. place where the image is formed sharpest is the focus of the mirror.

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