Light
Transcript of Light
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LightMade by: Gilbert Vincenta
Grade 7
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IntroductionLuminous: Objects that emit lightNon-luminous: Can only be seen if they are
reflecting light from a luminous source. Rays: Smaller lines of light.
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Classifying Non-Luminous ObjectNon-luminous materials can be classified as
transparent, translucent, or opaque according to the way light behaves when it meets them.
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ShadowsShadow = Region without light.Shape of the shadow may not identical to the
shape of the object.
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Studying ReflectionsIncident rayReflected rayNormalAngle of incidenceAngle of reflectionPlane mirrorImage
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ImagesThere are 2 kinds of images: Real images and
virtual images.
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The PeriscopeThe combined of the 2 plane mirrors.
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SurfacesThere are 2 types of surfaces: Smooth
surfaces and rough surfaces.
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Refraction & DispersionBending of the light ray is called refraction.Dispersion is the process in which the
wavelengths that travels at slightly different speeds and are spread out.
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The Rainbow
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ColoursThere are 3 main colours : Blue light, red
light, and green light.These 3 main colours are combined to
produce a new colour in a different proportion for every new colour.