Grade 5 Light Study Guide – Flashcards
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Light can travel in two ways: as a
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wave or a particle
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Light waves travel in
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straight lines
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Light wave type
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transverse (up and down)
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Peak
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the high point (crest) or low point (trough) of a wave
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Amplitude
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the distance from the mid or "resting point" to a peak
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Wavelength
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The distance between identical parts of a wave
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Reflection
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the "bouncing" of light form a shiny surface back to our eyes
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Angle of Incidence
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The angle at which a light wave strikes a mirror
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Angle of Reflection
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The angle at which a light wave leaves a mirror
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The Law of Reflection
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The Angle of Incidence is the same as the Angle of Reflection; when light strikes a mirror at a certain angle, it bounces off at the same angle, only reversed.
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Refraction
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the "bending" of light when it travels from one medium to another
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Transparent
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"see-through;" rays of light pass all the way through. An object behind this kind of medium can be clearly seen.
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Transparent medium example
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water, glass
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Translucent
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transmits some light through but not all. An object behind this kind of medium will appear fuzzy or blurry.
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Translucent medium example
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waxed paper
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Opaque
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does not allow any light to pass through. An object behind this kind of medium cannot be seen at all.
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Opaque example
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wood, metal, people
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Lens
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a transparent object that refracts (bends) light rays as they pass through it
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Convex lens
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A lens which curves outward. Light waves passing through it converge on a focal point.
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Concave lens
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A lens which caves in. Light waves passing through it diverge (spread apart).
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An image seen through a convex lens
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will be large and upright it the lens is close to it; or small and upside-down (inverted) if the lens is farther away than the focal point.
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An image seen through a concave lens
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appears smaller than life size, and right side up.
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Visible light
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the part of the electromagnetic spectrum that you can see; the colors of the rainbow
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ROY G BV
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Red Orange Yellow Green Blue Violet (the colors that make up White Light)
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The color with the longest wavelength
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red
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The color with the shortest wavelength
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Violet
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Prism
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a type of lens that can be used to refract white light and break it up into ROY G BV
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Electromagnetic Spectrum Wave Types
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Radio, microwave, infrared, visible, ultraviolet, X-ray, gamma ray
