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Explain the observations that light travels in a straight line through written or verbal forms, sketches or ICT in a creative way
Movement of Light
The properties of light is that
it moves straight, can be reflected
and
can be refracted.
Light is very important because it allows us to see the environment. These properties of light also provide many benefits to humans through various applications.
5.1
Movement of Light
Light travels from a light source in a straight line
Examples of situations where light moves in a straight line
Sunlight radiated through the trees
Spotlights on stage
Shadow clarity of object
Shadows are formed when a moving light is obstructed by an object
The clarity of the formed shadow varies according to the type of object that obstructs it, either:
Transparent
Translucent
Opaque
Transparent is a characteristic of an object (for example, clear plastic) that allows all light to pass through it
Translucent is a characteristic of an object (for example, colored plastic) that allows some light to pass through it
Opaque is a characteristic of an object (for example, a manila card) that does not allow light to pass through it
Factors affecting the size of shadows
Two factors affect the size of the shadow
Distance between an object with the light source
Distance between an object with the screen
The longer the distance between the object and the light source, the smaller the size of the shadow.
The longer the distance between the object and the screen, the bigger the size of the shadow.
Factors affecting the shape of shadows
The position of the light source makes the shape of the shadow different
The position/orientation of the object can also be changed to produce different shapes of shadows
Movement of Light
The properties of light is that
it moves straight, can be reflected
and
can be refracted.
Light is very important because it allows us to see the environment. These properties of light also provide many benefits to humans through various applications.
5.1
Movement of Light
Light travels from a light source in a straight line
Examples of situations where light moves in a straight line
Sunlight radiated through the trees
Spotlights on stage
Shadow clarity of object
Shadows are formed when a moving light is obstructed by an object
The clarity of the formed shadow varies according to the type of object that obstructs it, either:
Transparent
Translucent
Opaque
Transparent is a characteristic of an object (for example, clear plastic) that allows all light to pass through it
Translucent is a characteristic of an object (for example, colored plastic) that allows some light to pass through it
Opaque is a characteristic of an object (for example, a manila card) that does not allow light to pass through it
Factors affecting the size of shadows
Two factors affect the size of the shadow
Distance between an object with the light source
Distance between an object with the screen
The longer the distance between the object and the light source, the smaller the size of the shadow.
The longer the distance between the object and the screen, the bigger the size of the shadow.
Factors affecting the shape of shadows
The position of the light source makes the shape of the shadow different
The position/orientation of the object can also be changed to produce different shapes of shadows
Chapter : Properties of Light
Topic : Explain the observations that light travels in a straight line through written or verbal forms, sketches or ICT in a creative way
Year 4
Science
View all notes for Science Year 4
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