Question

The image formed by a single concave lens

A) is always real.
B) is always virtual.
C) could be real or virtual, depending on whether the object distance is smaller or greater than the focal length.
D) could be real or virtual, but is always real when the object is placed at the focal point.
E) is always inverted.

Answer 1

The image formed by a single concave lens is always virtual, smaller than the object, and upright.

Step-by-step explanation:

The image formed by a single concave lens is always virtual. In physics, a concave lens is called a diverging lens because it spreads out light rays that have been refracted through it. Such lenses can only produce virtual images that are on the same side of the lens as the object, and these images are always smaller than the object itself. This is known as a case 3 image. A real image, on the other hand, is always inverted, and its size can vary relative to the object. Virtual images, like those created by a concave lens, are upright and cannot be projected onto a screen. Only with an additional lens to form a real image can virtual images be captured, for example, on a camera sensor.

Therefore, the correct answer to the question of what kind of image a concave lens always forms is that it is always virtual (B), and it is not real or inverted.