You cover half of a lens that is forming an image on a screen. Compare what happ
ID: 1431340 • Letter: Y
Question
You cover half of a lens that is forming an image on a screen. Compare what happens when you cover the top half of the lens versus the bottom half.
A When you cover the top half of the lens, the top half of the image disappears; when you cover the bottom half of the lens, the bottom half of the image disappears. B The image becomes half as bright in both cases. C When you cover the top half of the lens, the bottom half of the image disappears; when you cover the bottom half of the lens, the top half of the image disappears. D Nothing happens in either case. E The image disappears in both cases.Explanation / Answer
Option B is correct. Light rays coming from the both parts of the object reach lens upper and lower half. If we stopp half the lens image brightness is decreased.