Question

An object is placed 20cm in
front of a concave mirror whose
focal length is 10cm. where and
how is the image formed?
A. Center of curvature and
inverted
B. 20cm behind the mirror and
inverted
C. 20cm in front of the mirror and
upright
D. 20cm in front of the mirror and
virtual

Answer 1

The correct answer is D. 20cm in front of the mirror and virtual.

When an object is placed in front of a concave mirror, if the object is located between the focal point (F) and the mirror, the image formed is virtual (i.e., not real) and located behind the mirror. In this case, the object is placed 20cm in front of the mirror, which is between the focal point and the mirror surface. Therefore, the image will be formed 20cm in front of the mirror and it will be virtual.