Question

Conduct an experiment to find out the focal length of the lens ​

Answer 1

Explanation:

1. Take a V-stand and place it on a long table at the middle.

2. Place a convex lens on the V-stand. .

3. Imagine the principal axis.

4. Light a candle and ask your friend to take the candle far away from the lens along the principal axis.

I hope it's help you