Question 1

What happens to parallel rays of light when they pass through a convex lens?

Accepted Answer

They converge to a focal point.

Answer

They diverge away from each other.

Answer

They remain parallel.

Answer

They are absorbed by the lens.

Question 2

What is the focal length of a convex lens?

Accepted Answer

The distance from the center of the lens to the focal point.

Answer

The diameter of the lens.

Answer

The radius of curvature of the lens.

Answer

The distance between the lens and the object.

Question 3

Which of the following is a characteristic of the image formed by a convex lens when the object is placed at a distance greater than the focal length?

Accepted Answer

The image is real and inverted.

Answer

The image is virtual and upright.

Answer

The image is distorted and unclear.

Answer

The image is larger than the object.

Question 4

What type of lens is used to correct farsightedness?

Accepted Answer

Convex lens.

Answer

Cylindrical lens.

Answer

Concave lens.

Answer

Bifocal lens.

Question 5

What is the effect of increasing the curvature of a convex lens?

Accepted Answer

It decreases the focal length.

Answer

It makes the lens thicker overall.

Answer

It increases the focal length.

Answer

It keeps the focal length the same.

Question 6

When looking through a convex lens, what happens to an object as you move it closer to the lens than the focal length?

Accepted Answer

The image becomes virtual and upright.

Answer

The image disappears.

Answer

The image becomes real and inverted.

Answer

The image remains the same size.

Question 7

In a ray diagram for a convex lens, what do the incident rays that are parallel to the principal axis converge towards after passing through the lens?

Accepted Answer

The focal point.

Answer

The vertex of the lens.

Answer

The optical center of the lens.

Answer

The center of curvature.

Question 8

What is the principal focus of a convex lens?

Accepted Answer

The point where parallel rays converge after passing through the lens.

Answer

The location of the object being observed.

Answer

The point where all light is absorbed.

Answer

The center of the lens.

Question 9

What effect does a convex lens have on light rays compared to a concave lens?

Accepted Answer

A convex lens converges light rays, while a concave lens diverges them.

Answer

Both lenses diverge light rays.

Answer

A convex lens diverges light rays, while a concave lens converges them.

Answer

Both lenses converge light rays.

Question 10

Which of the following applications uses a convex lens?

Accepted Answer

Magnifying glass.

Answer

Diving mask.

Answer

Binoculars.

Answer

3D glasses.

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