8
practice testMultiple Choice

Practice Test

Question 8 • Physics

Which accurately explains concave and convex lenses?

Answer
A
With convex lenses, placement of the object does not dictate which side of the lense the image will appear, but with concave lenses, they do.
B
With both concave and convex lenses, placement of the object dictates which side of the lense the image will appear.
C
With both concave and convex lenses, placement of the object does not dictate which side of the lense the image will appear.
D
With concave lenses, placement of the object does not dictate which side of the lense the image will appear, but with convex lenses, they do.

Explanation

A concave lens always forms a virtual image on the same side as the object, regardless of how far away the object is. A convex lens can form a real image on the opposite side when the object is beyond its focal point, or a virtual image on the object’s side when it is inside the focal point. Therefore, object placement affects which side the image appears on for a convex lens, but not a concave lens.

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