Light

What is the law of reflection?

• The angle of incidence is equal to the angle of refraction.

• The angle of incidence equals the angle of reflection.

• The angle of incidence is always greater than the angle of reflection.

• The angle of reflection is twice the angle of incidence.

How does light behave when it hits a mirror?

• Light bends and refracts when hitting a mirror.

• Light passes through a mirror without any change.

• Light reflects off a mirror according to the law of reflection.

• Light is absorbed completely by the mirror.

Define refraction of light.

• Refraction of light is the scattering of light in all directions.

• Refraction of light is the bending of light as it passes from one medium to another.

• Refraction of light is the absorption of light by a medium.

• Refraction of light is the reflection of light off a surface.

What happens to light when it passes from air into water?

• Light passes straight through without any change.

• Light bends and slows down when it passes from air into water.

• Light speeds up and changes color when it enters water.

• Light disappears completely when it hits the water surface.

List three properties of light.

• Emission

• Reflection, refraction, diffraction

• Absorption

• Polarization

What are the primary sources of natural light?

• The sun, moon, stars, and auroras.

• Reflected light from buildings

• Artificial lights from lamps and bulbs

• Light produced by fire and combustion

Name two artificial sources of light.

• Sunlight, Moonlight

• Candle, Fireworks

• Fluorescent paint, Bioluminescent algae

• Incandescent light bulb, LED light

What is an optical instrument?

• An optical instrument is a device that manipulates light to enhance vision or capture images.

• A device that measures temperature.

• An instrument used for sound amplification.

• A tool for measuring distance.

How does a magnifying glass work?

• A magnifying glass creates a hologram of the object.

• A magnifying glass works by reflecting light off a concave mirror.

• A magnifying glass uses a digital screen to display enlarged images.

• A magnifying glass magnifies objects by bending light rays through a convex lens.

What is the purpose of a prism in optics?

• To absorb light and prevent it from passing through.

• The purpose of a prism in optics is to refract light and separate it into its constituent colors.

• To magnify objects without altering their colors.

• To reflect light and create shadows.