Light and Sound
Sound - A travelling wave which is an oscillation of pressure transmitted through a solid, liquid or gas composed of frequencies within the range of hearing and of a level sufficiently strong to be heard or the sensation stimulated in organs of hearing by vibrations.
In other words SOUND is vibrations that our ears hear.
Properties of Sound:
- Sound travels in waves in all directions in a straight line from a source.
- Sound can be reflected (it can bounce off things).
- Sound can absorbed (it does not bounce off some things).
- Sound can be modified (e.g. pitch, loudness).
- Sounds is caused by vibrations.
What is Sound?
Light - A form of radiant energy that stimulates the organs of sight, having for normal human vision wavelengths ranging from about 3900 to 7700 angstroms and traveling at a speed of about 300 000 km per second.
In other words LIGHT is a type of energy we can see.
Properties of Light:
- Light travel in a straight line in waves in all directions from a source.
- Light reflects off smooth, shiny, flat surfaces in a regular reflection pattern.
- Light reflects off rough, shiny, uneven surfaces in a diffuse reflection pattern.
- Light that is not reflected is absorbed.
- Light bends as it passes through water.
What is Light?
Handout answers click here
Light vs Sound
Puzzle:
Light and Sound Word Search
Light vs Sound
Light and Sound Compared
Our Ears - Click the image to learn more about how we hear.
Video Links:
Other Reading:
Other Vocabulary:
Opaque - Not able to see through, not transparent
Transparent - Allowing light to pass through so that objects behind can be distinctly seen.
Translucent - Matter that transmits some but not all light.
Refraction - the fact or phenomenon of light, sound waves, being deflected in passing obliquely through the interface between one medium (air) and another (water) or through a medium of varying density.
Reflection - The throwing back by a body or surface of light or sound without absorbing it.
Angle of incidence is equal to the angle of reflection in a mirror or any matter that produces a regular reflective pattern.
Light and Sound Word Search
