Question

List 4 precautions a student should observe for focal length of convex lens

Answer 1

heyya....ur answer is here :

1. The object must be as far as possible, actually, sun is a good option

2. The image should be as sharp as possible

3.There should not be parallax errors

4. The zero errors should be counted in, and measure the perpendicular distance between lens and screen

5. The plane of lens and the plane of screen should be parallel .

hope it helps u...