Download Interactions of Light - Ms. Gravette and the Mad Scientists

Write on RIGHT Side
Transparent Glass
TRANSPARENT
• Matter that
transmits light.
• Objects can be
seen clearly
through it
• Ex: Air, water, some
types of glass
Non- Transparent
Brick Wall
• Frosted glass
causes the
image to look
fuzzy
Translucent
• Materials
transmit light, but
do not let the
light travel
straight through
• Objects look
distorted or fuzzy
• Ex: frosted glass,
lamp shades
Opaque
• Materials do not let
any light pass
through them
• Reflect light,
absorb it, or both
The shirt is opaque, because
light does not pass through it,
so we cannot see behind it
• Ex: wood, brick,
metal
Absorption
• When light enters a
material but does
not leave it
• The transfer of light
energy to matter
• The shirt absorbs the light
that falls on it, therefore
the shirt is opaque
When light
strikes a
smooth
surface such
as a mirror, it
reflects in a
uniform way
Reflection
• When light
bounces off
the surface of
an object
Reflection & Absorption
The frog’s body is green
because it reflects green
and absorbs the other
colors
Light Transmission
• The color of a
transparent or
translucent object
works differently than it
does for opaque
objects
• Some materials absorb
some colors but let
other color pass
through
• For example, a
green soda
bottle is not
green because
it reflects green
light, but
instead
transmits green
light (lets it pass
through) and
absorbs other
colors
Light through a Medium
• When light passes through an
object, it slows down
• Denser medium = slower light
• Different wavelengths slow
down more than others
• Ex: In a medium, the speed of
violet light is less than the
speed of red light
Refraction
• The change in
direction of a
wave as it passes
from one medium
into another at an
angle
• Causes a straight
object to appear
bent when it’s
underwater
LIGHT AND THE EARTH’S ATMOSPHERE
• Light waves travel
at 300,000,000 m/s
through space
• When light reaches
the Earth, it slows
down and refracts
due to the gases in
the atmosphere
Scattering
• When light is sent in
many directions as
it passes through a
medium
• The color of the sky
is due to scattered
light, because the
sky scatters light
with short
wavelengths (blue
& violet)
Reflection (Left Side)
• In text book, on page 313 cut out “Key
Concepts” (#6, 7, & 8)
• Answer the questions
• Glue/ Staple on the left side next to
notes