Transcript Light Waves - King Kaumuali`i Elementary School

Light Waves
Science
Quarter 1
Essential Questions
 How does light travel?
 How does light react to different objects
and substances?
Key Vocabulary
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light waves
electromagnetic spectrum
angle of reflection
angle of incidence
reflect / reflection
refract / refraction
absorb / absorption
Light Waves Assignment
You will work in a group to:
 Perform experiments to demonstrate how
light waves react upon hitting different
objects/substances
 Create an informational Powerpoint
about light waves
Movement
of Light Waves
 Light travels in the form of electromagnetic
waves
 Light spreads out in all directions from its source
 Light travels in straight lines called rays
 Light travels at the “speed of light”
186,282 miles per second
299,792 kilometers per second
Reflection
 Reflection
happens when
light waves
bounce off a
surface
Refraction
 Refraction happens
when light changes
speeds and/or is
bent (traveling from
air to water)
Absorption
 Absorption of light
happens when atoms in
an object absorb (take in
and hold) the light
waves.
For example: You are able to
see a red apple because all of
the other light waves are
absorbed but red is reflected
to your eyes.
Experiments with Light
Use the following website to conduct
experiments on reflection, refraction and
absorption
General Electric Website:
 http://www.gelighting.com/na/home_lighting/gel
a/students/science_what_is_light.htm
Light Wave Rubric
ME
Light
Waves
Compare
and give
examples
of the
ways light
can be
reflected,
refracted
and
absorbed
MP
Compare
what
happens
to light
when it is
reflected,
refracted
and
absorbed
N
U
Describe
that light is
reflected,
refracted
and
absorbed
Provide
examples
of
reflection,
refraction
and
absorption
of light
Resources
 General Electric Website
(images, experiments and content reading)
 Sciensaurus