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Science Prep.2
The quantity of light
in transparent media
N.B decreases as the
thickness of the
media.
5-Light travel in straight
lines:
Light propagate (travels) in straight lines in transparent media and its
thickness can be controlled.
6-Light intensity
(Brightness):
It is the quantity of light falling perpendicular on a unit area of a surface in
one second.
So, we conclude the inverse square law of light:
Light intensity of a surface is inversely proportional to the square of the
distance between the source of light and this surface.
Light intensity ∝
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