Quiz on Thin Converging Lenses

What is the primary function of a convex lens?

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

Which term describes the point where parallel rays converge after passing through a convex lens?

• Optical Centre
• Principal Axis
• Principal Focus
• Focal Length

What happens to a ray that passes through the optical center of a convex lens?

• It bends towards the principal axis
• It continues in a straight line
• It diverges
• It converges at the focal point

How many principal foci does a convex lens have?

• One
• Two
• Three
• Four

If a ray of light travels parallel to the principal axis, what will happen after it passes through the lens?

• It will continue parallel
• It will converge at the optical center
• It will refract through the principal focus
• It will diverge

What type of image is formed when light rays converge and can be projected onto a screen?

• Virtual Image
• Real Image
• Inverted Image
• Upright Image

Which of the following statements is true about a virtual image?

• It can be projected onto a screen
• It is always larger than the object
• It appears to diverge from a point
• It is inverted

What is the distance between the principal focus and the optical center of the lens called?

• Optical Length
• Focal Length
• Principal Distance
• Image Distance

In a ray diagram, what does the principal axis represent?

• The path of light rays
• The central line of the lens
• The point of convergence
• The distance to the image

When a ray passes through the principal focus, what is its behavior after passing through the lens?

• It diverges
• It continues straight
• It emerges parallel to the principal axis
• It converges at the optical center