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Science
Light Move in a Straight Line
Science
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Light Move in a Straight Line
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Properties of light
It moves straight, can be reflected and can be refracted
Examples of situations where light moves in a straight line
Sunlight radiated through the trees & spotlights on stage
Formation of shadow
Shadows are formed when a moving light is obstructed by an object
The factor that affects the clarity of the shadow
The transparency and the opacity of the object
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, coloured 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
Two factors that affect the size of the shadow
Distance between an object with the light source & Distance between an object with the screen
The condition that causes small shadow size
The distance between the object and light source is long
Factors affecting the shape of shadows
The position of the light source & the position/orientation of the object
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