Question

5. How can a convex lens light a matchstick if held
towards the sun?

Answer 1

Answer:

The convex lense converges all the rays coming from the sun at one point(Focus).Here at the matchstick.Hence heat is produced, it reaches the ignition temperature of matchstick and it burns the matchstick.

Answer 2

Answer:

A magnifying glass is a convex lens. It can light up a match stick using the sun's light ray. The glass will concentrate the sun's rays into a much smaller focal point causing that area to heat up very quickly. When the match stick gets heated up, it will ignite.

Explanation:

A magnifying glass is a convex lens. It can light up a match stick using the sun's light ray. The glass will concentrate the sun's rays into a much smaller focal point causing that area to heat up very quickly. When the match stick gets heated up, it will ignite.