Optics - Concave Mirror

A spherical concave mirror is shown in the figure above. The focal point F and the location of the object O are indicated. At what point will the image be located?

A. I
B. II
C. III
D. IV
E. V

(GR0177 #12)

Solution:

The mirror equation:



The picture shows:   is negative.
The image is VIRTUAL (inside the mirror) i.e. at point V

Answer: E

Note:
For concave mirror:

• If an object is located BEFORE the focal point then image is VIRTUAL (inside the mirror).
• If an object is located AFTER the focal point then image is REAL (outside the mirror).