SOUND AND LIGHT

If you have a question, please scroll down at the end of each lesson and write your question in the comments section. I will respond to all questions.


What is Sound?
Sound is a form of energy.
 http://www.youtube.com/watch?v=pyKdUpJQBTY



How is sound produced?
Sound is produced when matter vibrates. 
http://www.youtube.com/watch?v=_ovMh2A3P5k
 
What does vibrate mean?

To move rapidly back and forth.

http://www.youtube.com/watch?v=PDiQu_W1fmQ

How does sound travel?
Sound travels by sound waves.
http://www.youtube.com/watch?v=PDiQu_W1fmQ

Sound wave

A wave produced by vibrations.
http://www.youtube.com/watch?v=A7WLWki4CjA

What is Light?

A form of energy that sometimes can be seen.

http://www.youtube.com/watch?v=PZfHn1YJVGk

Photons

Small bundles of energy that make up light.

http://www.youtube.com/watch?v=qbM39XZMrNI

Prism

A clear piece of glass or plastic that is shaped like a triangle and can be used to separate white light.

Visible spectrum

The band of colors that make up white light.

Image

A copy or likeness.
 

Plane mirror

A flat, smooth mirror.

Reflection

The bouncing back of a light wave.

http://www.youtube.com/watch?v=81u7MGF7ev4

Concave mirror

A mirror that curves in at the middle.

Convex mirror

A mirror that curves outward at the middle.

Refraction

The bending of a light wave as it moves from one material to another.
http://www.youtube.com/watch?v=DtDaQPbKV9s

Lens

A curved piece of clear material that refracts light waves.