Answer:

Introduction:
Convex lenses are used to produce real and inverted images of objects. The number of clear images that can be received on a screen using a convex lens depends on the position of the lens with respect to the object.

Explanation:

When an object is placed at a distance greater than the focal length of the convex lens, a real and inverted image is formed on the other side of the lens. The image is formed at a distance equal to the focal length of the lens. If the distance between the object and the lens is increased, the image becomes smaller and moves away from the lens.

When the object is placed at a distance lesser than the focal length of the lens, a virtual and erect image is formed on the same side of the lens. The image is formed at a distance greater than the focal length of the lens. If the distance between the object and the lens is decreased, the image becomes larger and moves away from the lens.

If the lens is shifted slightly, the position of the image also changes. If the lens is moved towards the object, the image moves away from the lens and becomes larger. If the lens is moved away from the object, the image moves towards the lens and becomes smaller.

Since the lens can be shifted in any direction, an infinite number of images can be formed on the screen. However, only one image can be sharp and clear at a time. The other images will be blurred and distorted due to the movement of the lens.

Conclusion:

In conclusion, using a convex lens, a clear image of a candle flame can be produced on a screen. If the lens is to be shifted, an infinite number of images can be received on the screen. However, only one image can be sharp and clear at a time.

(b) Only one more