Question

For a concave lens, if the image distance, di, is negative, where does the image appear to be with respect to the object?

a) Real and on the same side as the object.

b) Virtual and on the same side as the object.

c) Real and on the opposite side of the object.

d) Virtual and on the opposite side of the object.

Answer 1

For a concave lens, a negative image distance means the image is virtual and appears on the same side of the lens as the object.

Step-by-step explanation:

When dealing with a concave lens, if the image distance (di) is negative, this indicates that the image formed is virtual. A negative image distance for a lens indicates that the image is located on the same side of the lens as the object. Therefore, the correct answer is b) Virtual and on the same side as the object.

The nature of images formed by thin lenses is predictable by the signs of the image distance and focal length. In this case, a concave lens always has a negative focal length. Whenever the object distance is positive, which it is in real-world scenarios, the image distance for a concave lens is negative, meaning the image is virtual and upright.