gcsescience.com                                       31                                       gcsescience.com


What is the Total Internal Reflection of Light?

When a light ray tries to move from glass to air at an
angle greater than the critical angle (see the previous page)
the refracted ray cannot escape from the glass.
Refraction cannot happen and all of the light is reflected
at the glass / air boundary, as if it had hit a mirror, i = r.

Total Internal Reflection of Light between Glass and Air

It is called internal reflection because it
occurs inside the glass, and it is called total
because all the light must be reflected.

Total Internal Reflection (TIR)
has uses in prisms and optical fibres.

back      Links      Waves      Light      Revision Questions      next

gcsescience.com       Physics Quiz       Index       Light Quiz       gcsescience.com

Home      GCSE Chemistry      GCSE Physics

Copyright © 2015 gcsescience.com. All Rights Reserved.