Grade 10 Science

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Grade 10 Science Optics (Refraction and Lenses)
Images in Lenses Vision Issues Refraction More Images in Lenses More Refraction
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It occurs when the object is at the Focus (F) of
a Converging Lens and the light rays do not
converge past the lens
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What is No Image is produced?
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It is where the light ray travels when it
originates from the object parallel to the
Principal Axis and passes through a Converging
Lens
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What is the Principal Focus?
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In this type of lens, the image is always (1)
smaller than the object, (2) upright, (3) on the
same side of the lens as the object and (4)
virtual.
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What is a Diverging Lens?
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In a Diverging Lens with the object between 2F
and F, it is the correct illustration depicting
the image
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What is (a)?
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These are the SALT properties of the image when
using a Converging AND the object is gt2F.
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What is (1) smaller, (2) inverted(3) real,
and (4) between F and 2F?
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The picture is an example of this type of vision
problem
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What is Far-Sightedness or Hyperopia?
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The type of lens that will correct
far-sightedness.
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What is a Converging Lens?
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It is the irregular shape of this part of the eye
that can contribute to vision problems.
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What is the Cornea?
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The diagram of the human eye shows this type of
vision problem
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What isNear-sightedness or Myopoia?
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The picture illustrates this dual vision problem.
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What is Astigmatism? (both far- and
near-sightedness)
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The bending of light as it moves from one medium
to another medium.
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What is Refraction?
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300,000 km/s
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What is the Speed of Light in Air?
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Light does this when it travels from a fast
medium to a slow medium
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What is bends towards the Normal?
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In the diagram, it is the FASTER medium.
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What is n1?
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This picture depicts the refraction of sunlight
through raindrops. Refraction produces this
spectacular sky phenomenon.
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What is a Rainbow?
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It correctly depicts the passage of a light ray
through a Diverging (concave) Lens.
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What is (c)?
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The point in the centre of the lens
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What is the Optical Centre?
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The object is at F. It is the Ray Diagram that
correctly depicts the refraction through the
Converging Lens
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What is (a)?
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A lens that is thick in the middle and thin at
the edges
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What is a Converging (or convex) Lens?
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It correctly shows a light ray passing through
the Optical Centre of a Converging Lens
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What is (c)?
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The Angle of Incidence that gives a 90O Angle of
Refraction (i.e., the light ray travels along the
boundary between the two media).
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What is the Critical Angle?
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The image depicts when the light ray is no longer
refracted
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What is Total Internal Reflection?
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An image that is visually misleading.
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What is an Optical Illusion?
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The ratio of the speed of light in a vacuum to
the speed of the light in the considered medium
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What is Index of Refraction?
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It is what D represents
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What is Angle of Refraction?