Sound and Light Chapter 4

Front

What is reflection in terms of light?

Back

Reflection is the bouncing back of light rays when they hit a surface that does not absorb the light.

Front

What is refraction?

Back

Refraction is the bending of light as it passes from one medium to another, changing its speed.

Front

What does it mean for a material to be opaque?

Back

An opaque material does not allow light to pass through it.

Front

What is the role of the iris in the eye?

Back

The iris controls the size of the pupil and regulates the amount of light that enters the eye.

Front

What part of the ear is responsible for amplifying sound?

Back

The middle ear amplifies sound through the vibration of the eardrum and ossicles.

Front

How does light travel?

Back

Light travels in straight lines.

Front

What is absorption in the context of light?

Back

Absorption is the process by which a material takes in light energy, preventing it from passing through.

Front

What is diffusion of light?

Back

Diffusion is the scattering of light rays in many directions when they hit a rough surface.

Front

What is the function of the cornea?

Back

The cornea helps to focus light as it enters the eye.

Front

What is the retina?

Back

The retina is the part of the eye that contains light-sensitive cells and converts light into electrical signals.