Quiz on Thin Converging Lenses

What is the primary function of a converging lens?

• To collect parallel rays of light
• To disperse light rays
• To reflect light rays
• To absorb light rays

What is the optical center (P) of a lens?

• The point where light rays converge
• The point where light rays pass through without deviation
• The point where light rays diverge
• The point where the lens is thickest

Which of the following describes the principal focus (F) of a convex lens?

• The point where light rays diverge
• The point where light rays converge after passing through the lens
• The center of the lens
• The distance from the lens to the object

What happens to a ray that travels parallel to the principal axis when it passes through a convex lens?

• It continues straight
• It diverges
• It refracts through the principal focus
• It is absorbed by the lens

If a real image is formed by a convex lens, which of the following statements is true?

• It is always upright
• It cannot be projected onto a screen
• It can be larger or smaller than the object
• It is always the same size as the object

What is the focal length (f) of a lens?

• The distance from the lens to the object
• The distance between the optical center and the principal focus
• The thickness of the lens
• The distance between two principal foci

Which ray diagram represents a ray that passes through the optical center (P)?

• It bends towards the principal focus
• It continues in a straight line without deviation
• It diverges after passing through the lens
• It is absorbed by the lens

What type of image is formed when light rays appear to diverge from a point?

• Real Image
• Virtual Image
• Inverted Image
• Magnified Image

How many principal foci does a convex lens have?

• One
• Two
• Three
• Four

Which of the following statements is true regarding virtual images?

• They can be projected onto a screen
• They are always inverted
• They cannot be projected onto a screen
• They are always larger than the object