Properties of Light
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•
Science
•
4th Grade
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Hard
U T
Used 5+ times
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11 Slides • 0 Questions
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Properties of Light
P4 science unit 10
By U T
2
We are able to see if the light enters our eyes
HOW DO WE SEE
OBJECTS AROUND US?
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THE SUN
BURNING CANDLES
STARS
EXAMPLE OF LIGHT SOURCES
THINGS THAT GIVE OUT LIGHTS DIRECTLY
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Light from the light sources fall from the object. Then the light reflects and enter our eyes.That show reflection is when light bounces off an object.
WHAT IS REFLECTION?
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The amount of Light reflected from different surface is different
a smooth surface reflects
light in same direction
a rough surface reflects
light in different direction
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we use mirror to see object we cannot look at directly. This is possible because the object reflect the light from the light sources onto the mirror
MIRROR
A periscope allows us to see objects that we are not looking at directly. It consists of 2 mirrors to reflect light into our eyes
PERISCOPE
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three categories of materials
TYPE OF MATERIALS | DESCRIPTION | EXAMPLES |
|---|---|---|
TRANSPARENT material allow almost all light to pass through | We can see clearly through them | glass window clear plastic |
TRANSLUCENT material allow some light to pass through | We cannot see clearly through them | frosted glass tissue paper |
OPAQUE material do not allow any lights to pass through | We cannot see through them at all | wood metal |
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A SHADOW IS FORMED BECAUSE THERE IS NO LIGHT ALLOWED TO PASS THROUGH THE OBJECT
HOW ARE SHADOW FORM?
Properties of Light
P4 science unit 10
By U T
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