Mirror Ensemble
Question:
Which object can act as glass
and mirror at the same time?
Instructions:
1. Put
each object in front of you. Which one has the highest
reflectivity?
2.
Put each object in front of the lamp. Which one is the
most transparent?
Why?
The reflectivity of an object
depends very much upon the nature and smoothness of its
surface. The surface of glass is very smooth, and a coating
of aluminium renders it an ideal material for making mirrors.
In reality, objects sufficiently smooth behave like mirrors
to a certain degree. While glass is well known for its
transparency, other objects, in particular the thin ones,
can also let light pass through provided the energy of
the light source is intense enough. Amazing stunning visual
effects may be achieved by applying this principle properly.
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