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Chapter 23 Section 1

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Jim Burnett

on 29 November 2015

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Transcript of Chapter 23 Section 1

Mirrors and Lenses
Rays and the Path of Light Waves

-because light travels in straight lines
you can use a RAY to symbolize it

Rays and Reflected and Refracted Light

- Rays in ray diagrams show changes in the
direction of light whether it is reflected
or refracted!

Plane Mirrors - a mirror that has a flat surface.
Because of a plane mirrors flat surface, the image created
is "virtual, the same size as the real image, upright, and the
same distance behind the mirror as the real image is in front of the mirror".
Virtual means that it appears on the "other" side of the mirror, and Real means that it appears on the same side of the mirror as the original image.
Concave Mirrors - A mirror that curves inward
F is the focal point which is literally
the point through which all rays from
the image will focus
C is twice the focal length referred to as
the Center of the curve if the curve continued
around to complete the circle.
O is the object that is being reflected
I is the Image reflected by the mirror
If the Object is located outside of C on a concave mirror, the image will be REAL (on the same side of the mirror), inverted (upside down), and smaller.
If the image is inside of the focal point, the image will be Virtual (other side of the mirror), upright, and larger than the original.
Convex Mirrors - a mirror that curves outward.
This one gets a little hairy! The image in a convex mirror will appear Virtual (other side of the mirror) inside of the focal point, upright, and smaller
Last but not least are lenses...
With light traveling through a convex lens, assuming that the object is inside of the focal point (between the lens and focal point), the image is virtual (same side of the LENS, different from mirrors), upright and larger
If the object is outside of the focal point, the image
will be real (other side of the lens again different from mirrors), inverted and the same size unless the object is MORE than twice the distance of the focal point, then the image will be smaller.
Concave lens - thinner at the middle than at the edges.
With a Concave lens, the image as you can see
will be Virtual (same side of the lens), upright and diminished or smaller that the object.
Full transcript