Physics 2014 JAMB Past Questions - Question 30: The focal length of a concave mirror is 2.0cm .If an object is placed 8.0cm from it ,the image is at

Correct Answer

D

Explanation

To determine the position of the image formed by a concave mirror, we can use the mirror formula:

1/f = 1/v - 1/u

Where:
f is the focal length of the mirror,
v is the distance of the image from the mirror, and
u is the distance of the object from the mirror.

Given that the focal length (f) of the concave mirror is 2.0 cm and the object distance (u) is 8.0 cm, we can substitute these values into the formula:

1/2.0 = 1/v - 1/8.0

Simplifying the equation:

1/v = 1/2.0 + 1/8.0
1/v = 4/8 + 1/8
1/v = 5/8

To find v, we can take the reciprocal of both sides:

v = 8/5

Therefore, the image is formed at a distance of 8/5 cm from the concave mirror.