Transcript 14.2 Flat Mirrors!

13.2 Flat Mirrors!
How else do you look pretty in the
morning?
Reflection
The turning back of an electromagnetic
wave at the surface of a substance
Reflection
The texture of a surface affects how it
reflects light
Diffuse reflection- light that is reflected
from a rough, textured surface
Specular reflection- light reflected from
smooth, shiny surfaces
ANGLES
Angle of Incidence- the angle between a ray
that strikes a surface and the normal to that
surface at the point of contact
θ
Angle of Reflection- the angle formed by the
line normal to a surface and the direction in
which a reflected ray moves
θ′
θ=θ′
Flat (Plane) Mirrors
Simplest of all mirrors
Light rays bounce off objects in front of
the mirror and reflect from the mirror’s
surface.
An object's reflection is said to be
located behind the mirror (not literally)
The object distance (do) is equal to the
image distance (di)
VIRTUAL IMAGES
The only thing flat mirrors form (albeit
self-consciousness)
Virtual image- an image formed by light
ray that only appear to intersect
Can never be displayed on a physical
surface
hi=ho
Objects on the left
appear on the right
RAY DIAGRAMS
Ray diagrams- drawings that use simple
geometry to locate an image formed by
a mirror