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Light and Shadows - Coggle Diagram
Light and Shadows
How shadows are formed
When is light is blocked by an object
Forms at opposite side of the light source
Opaque
Dark shadows
Translucent
Light shadows
Transparent
No or little shadows
Video - Shadows
Sources of Light
All stars including the Sun
Some animals such as fireflies
Fuels when they burn
Coal
Firewood
Lit candles
Some non-living things when they are switched on
Electric bulbs
Lamps
Torchlights
Video - Light Sources
What is light?
A form of energy
Helps us see things
Travels in straight lines
Video - Light
Light passes through different materials
Transparent
Allows most light to pass through
See through it clearly
Examples
Glass
Clear plastic
Air
Drinking Water
Translucent
Allows some light to pass through
Cannot see through it clearly
Examples
Frosted Glass
Tracing Paper
Cloth
Some types of plastic
Opaque
Does not allow light to pass through
Cannot see through it
Examples
Metals
Wood
Rubber
Clay
Measurement of the amount of light that passes through
Datalogger
Thicker the material, less the amount of light can pass through
Ways to change shape and size of shadow
Bigger Shadow
Object is nearer to the light source or further from the screen
Smaller Shadow
Object is further from the light source or nearer to the screen
Different angles, different lengths
Different parts, different shapes
How light helps us to see things
Light from these objects enter our eyes
Object must be either a...
Source of light
Gives off light that enters our eyes
Can see the object directly
Reflects light from a source of light
Reflects light from a source of light
Can see the object
Reflection of light helps us see images in the mirror
Light from the surroundings -> Smooth surface of the mirror
Periscope
Object reflects light from surroundings
