1. Light travels from a
, and travels in a straight line.
2. We are able to see objects around us because they
into our eyes.
light
3. More light can be reflected in the same direction from a
surface, which makes it appear shinier.
4. A
allows us to see objects behind us.
5. A
from where we are.
allows us to see objects that cannot be seen directly
6. A simple
is a tube made up of two mirrors which reflect
light and enables us to see over walls and around corners.
7. Glass and some plastics that allow light to pass through them are called
materials.
8. Paper, plastic, cloth and frosted glass that allow some light to pass through them
are called
materials.
9. Wood, metal, some plastics, cardboard and clay that do not allow any light to
pass through them are called
materials.
10. An object can cast shadows of different
and
, depending on the position of the object and the position
of the light source.
Opaque
: Materials that do not
materials allow light to pass through
them
Periscopes : Tubes with mirrors arranged
to allow the user to see
objects that are hidden from view
Reflect
: Throw back light from a
surface
Translucent : Materials that allow some
materials light to pass through them
Transparent : Materials that allow light
materials to pass through them
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