The heat produced at a point due to concentration of sunlight by a convex lens burns a paper. (a) Explain…
The heat produced at a point due to concentration of sunlight by a convex lens burns a paper.
(a) Explain why it happens.
(b) Name the term (in the context of the lens used) given to the point at which the paper starts burning. What does the bright spot formed on the paper represent ?
Solution
(a) The sun light is converged at a point by convex lens which generates heat causing the paper to burn.
(b) Principal Focus
Real image of the Sun.