Question

When this magnifying glass is held directly in front of sunlight and above a paper. A
bright and dark spot of light is formed on the paper and exactly at that point paper started
burning, because
a) The image of the sun was formed at 2F
b) The image of the sun was formed at F
c) The image of the sun was formed between F and 2F
d) The image of the sun was formed beyond 2F

Answer 1

Answer:

anwer is (B)

Since we consider light rays coming from infinity as parallel rays thus sun rays are always parallel and we know that parallel rays to the principal axis meet at focus after refraction from convex lens.. this Image will be formed on the Focus a.k.a F

thank you