Lens
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Transcript of Lens
Lenses
What is a lens?
Curved piece of glass or other transparent material that is used to refract light
What does the image depend on?
The size and shape of the lens
What is a concave lens?
A lens that is thinner in the middle
It CAVES in…
Picture time!
Focal Point
Image appears smaller but right side up
Picture time!
Picture time!
Picture time!
Animation time!
What happens to the rays of light?
They spread out from a (VIRTUAL) focal point on the same side of the lens as the source
Image appears smaller
What is a convex lens?
A lens that is thicken in the center than at the edges
VEX – EXit out…it curves out…
Picture time!
Focal Point
Image appear upside down, larger or smaller depending on the distance from the focal point
Picture time!
Picture time!
Picture time!
Picture time!
Animation time!
What happens to the rays of light?
They focus to a point, then invert the image.
Let’s Venn again!!!
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