Properties of Light Energy Additional Material Summary
Light: How It Works
1.
What
Is Light?
·
Definition: Light is a form of energy that
allows us to see things.
·
Straight Line Travel: Light travels in straight lines
from its source.
·
Reflection: When light hits a surface, it
can bounce back. For example:
o Mirrors: Mirrors reflect light, allowing
us to see our own reflection.
o Periscopes: Periscopes use mirrors to see
around corners.
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2.
Transparent,
Translucent, and Opaque Materials
·
Transparent Materials:
o Definition: These materials allow light to
pass through completely.
o Examples: Clear glass, water, and air.
·
Translucent Materials:
o Definition: These materials allow some
light to pass through but scatter it.
o Examples: Frosted glass, wax paper, and
foggy windows.
·
Opaque Materials:
o Definition: These materials block light
completely.
o Examples: Wood, metal, and cardboard.
3.
Shadows
·
Definition: Shadows are areas where light
is blocked by an object.
·
How Shadows Form:
o When
light hits an object, it creates a shadow on the opposite side.
o The
size and shape of the shadow depend on the position of the light source and the
object.
·
Examples:
o Stand
in front of a lamp and notice your shadow on the wall.
o During
a sunny day, trees cast shadows on the ground.
