Eyes+Light

Question 1

In which type of mirror can you always expect an image that is virtual and the same size as the object?

Answer 1

Plane mirror

Plane mirrors produce images that are virtual and of the same size as the object.

Question 2

What is myopia?

Answer 2

Near-sightedness; can’t see objects far away

Myopia occurs when the image forms before the retina.

Question 3

What type of lenses are needed to correct myopia?

Answer 3

Diverging lenses

Diverging lenses help to spread light rays out, allowing for clearer vision of distant objects.

Question 4

What is hyperopia?

Answer 4

Far-sightedness; can’t see objects close up

Hyperopia occurs when the image forms beyond the retina.

Question 5

What type of lenses are needed to correct hyperopia?

Answer 5

Converging lenses

Converging lenses help to focus light rays, improving vision for nearby objects.

Question 6

What is the Law of Reflection?

Answer 6

The angle of Incidence (when the light ray strikes the surface) is equal to angle of reflection (when the light ray bounces off).

Foot note:

Both angles are measured relative to a line perpendicular to the surface at the point of impact (the normal).

Question 7

How is a virtual image different from a real image?

Answer 7

Real images form when actual light rays intersect; virtual images form when extensions of light rays intersect

Real images can be captured on a screen, while virtual images cannot.

Question 8

List five different types of light.

Answer 8

• Incandescent
• Fluorescent
• [additional types can be added based on context]

Examples include incandescent light bulbs and fluorescent tube lights.

Question 9

Fill in the blank: The angle of incidence must equal the angle of _______.

Answer 9

reflection

This principle is fundamental in understanding the behavior of light upon reflection.