For the determining focal length of a concave mirror, a teacher asks her students to identify concave mirror from a few mirrors lying on the table. The reason given by A, B, and D for picking up the right mirror is as follows: A: the mirror is depressed at the center and self image formed is enlarged and erect. B: the mirror is raised at the center and self image formed is smaller and erect. C: the mirror is plane all over and self image is of same size. D: the mirror is depressed at the center and self image formed is enlarged and inverted. Which reason is correct? Justify your answer.

For the determining focal length of a concave mirror, a teacher asks h

1.	For the determining focal length of a concave mirror, a teacher asks her students to identify concave mirror from a few mirrors lying on the table. The reason given by A, B, and D for picking up the right mirror is as follows: A: the mirror is depressed at the center and self image formed is enlarged and erect. B: the mirror is raised at the center and self image formed is smaller and erect. C: the mirror is plane all over and self image is of same size. D: the mirror is depressed at the center and self image formed is enlarged and inverted. Which reason is correct? Justify your answer.
Answer» Solution :The REASON given by A is correct. A spherical mirror, WHOSE REFLECTING surface is curved inwards is called a CONCAVE mirror. When the face is PLACED close to concave mirror (so that the face is within the focus) the concave mirror produces enlarged and erect image.