PowerPoint Presentation
REFLECTION OF LIGHTTerms Used :Incident Ray : Ray of light that
falls on a reflecting surface(e.g. Mirror)[I]Reflected Ray: Ray of
light that leaves the reflecting surface[R]Normal : Line drawn
perpendicular to the reflecting surface at the point where the
incident ray meets the surface.[N]Angle of incidence: Angle that
the incident ray makes with the normalAngle of reflection : Angle
that the reflected ray makes with the normal
IRNirAngle of incidence is equal to angle of reflection i =
r
The incident ray, the reflected ray and the normal all lie in
the same plane.
Laws of ReflectionPeriscope An apparatus that is made up of
mirrors or prisms to view objects that cannot be seen otherwise.A
simple periscope consists of two plane mirrors placed parallel to
and facing one another .The mirror is placed such that the angle of
incidence is 45.
Application:
(Using Prisms)Reflection of a parallel beam of light on a plane
mirror results in Regular reflection as the reflected beam is also
parallel.Reflection of a parallel beam of light on to a
rough(irregular) surface results in Diffused reflection as the
angle of incidence varies at each point on the surface and thus
scattering the rays in different directions.
Regular & Diffuse reflection
