week 8a

What is light?

• type of sound wave

• A form of magnetic energy

• A narrow band of electromagnetic radiation

• A type of thermal radiation

How is light conceptualized?

• As a sound wave

• As a particle

• As a wave and a stream of photons

• As a form of kinetic energy

What is a photon?

• A type of subatomic particle

• A basic unit of electromagnetic energy

• A type of magnetic field

• A form of thermal energy

What is absorption?

• The process of transmitting energy

• The process of converting energy from one form to another

• The process of taking up energy and not transmitting it at all

• The process of reflecting energy off a surface

Why does each object appear to be a certain color?

• Because the object absorbs all wavelengths of light equally

• Because the object reflects all wavelengths of light equally

• Because the object absorbs some wavelengths of light more than others

• Because the object emits its own light

What is reflection?

• The process of absorbing energy

• The process of transmitting energy

• The process of redirecting energy when it strikes a surface

• The process of altering energy as it passes into another medium

What is refraction?

• The process of absorbing energy

• The process of transmitting energy

• The process of redirecting energy when it strikes a surface

• The process of altering energy as it passes into another medium

Which of the following best explains why we can see the color, texture, and shininess of objects?

• Because light is reflected off surfaces and changes its characteristics

• Because objects emit light

• Because light is absorbed by objects

• Because light is transmitted through objects

.......... of the light we see is reflected of surfaces.

• most

• few

What is the pupil?

• A muscle that controls the size of the lens

• gel-like substance that fills the eye

• A layer that covers the iris

• A hole in the center of the iris