By: Melissa, Luisa and Sebastiรกn G.
ď‚ž It
is a mirror with a planar reflective surface.
ď‚ž They
are used every day to allow people to see themselves.
ď‚žA
Mirror has an imaginary straight line at a right-angle to it, called the normal angle. A ray of light hits the mirror at an angle to the normal, but is reflected at the same angle that it hits the mirror in the opposite direction.
ď‚ž
A plane mirror is placed under the scale and pointer. When the pointer moves, the image in the plane mirror also moves.