When using a magnifying glass to focus the Sun onto a piece of paper, the distance from the lens to the paper should be
A) less than the focal length of the lens.
B) equal to the focal length of the lens.
C) greater than the focal length of the lens.
D) Not enough information is given to determine.

Question

Quizplus · Accepted Answer

The distance from the lens to the paper should be equal to the focal length of the lens to focus the Sun's parallel rays onto a single point, causing the paper to burn.

When Using a Magnifying Glass to Focus the Sun onto a Piece