A concave mirror having a focal length of magnitude 5.0 cm forms an image 4.0 cm behind the mirror.Where is the object for this image?
A)2.2 cm in front of the mirror
B)2.2 cm behind the mirror
C)9.0 cm in front of the mirror
D)1.0 cm behind the mirror
E)20 cm behind the mirror

Question

Quizplus · Accepted Answer

The object is 2.2 cm in front of the mirror.The image is formed 4.0 cm behind the mirror, which means that the object is 4.0 cm in front of the mirror. However, the mirror is concave, which means that the image is virtual and upright. Therefore, the object must be 2.2 cm in front of the mirror.

A Concave Mirror Having a Focal Length of Magnitude 5