A converging lens and a screen are so arranged that an image of the sun falls on the screen.The distance from the lens to the screen is
A)the focal length.
B)the object distance.
C)the magnifying power.
D)one-half the radius of curvature of one of the lens faces.
E)the average radius of curvature of the two lens faces.

Question

Quizplus · Accepted Answer

When an image of the sun is formed on the screen, it means that the rays from the sun are converging after passing through the lens and forming a real image on the screen. This happens only when the screen is placed at the focal point of the lens. Therefore, the distance from the lens to the screen is equal to the focal length of the lens. Hence option A is the correct choice.

A Converging Lens and a Screen Are So Arranged That