Mirrors why bother? see yourself telescopes cars Projectors/TV magic.

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Presentation transcript:

Mirrors why bother? see yourself telescopes cars Projectors/TV magic

3 types of mirrors Flat (plane, infinite) Concave (caved in, converging) Convex (vexed out, diverging)

Plane Mirrors Is this kind of plane mirror possible?

Curved Mirror Terms C f principal axis focal point= r/2 (horizontal light focuses here) The Center of Curvature or radius “r”

Real vs. Virtual Images Virtual Image : Light reflects off mirror but diverges (scatters) so it appears on the opposite side of mirror (you see it, but only in your mind- it’s not there! Real Image : Light from an object reflects off mirror, converges (focuses) back on same side of mirror (you see it and can feel it or re-project it) Real Image Virtual Image Object

Virtual images are posers!

Real images are inverted always!

3 types of curved mirror pictures Convex object anywhere Concave- object closer than focal pt. Concave- object further than focal pt. C f C f C f

Summary: Concave Object far from mirror: real, inverted, smaller Object very close: virtual, upright, larger Object very close: virtual, upright, larger

Summary: Convex Mirrors No matter where you put the object,…. Only get……virtual, upright, smaller images

The end- see it again on my web site! Hubble Telescope