shadow - Rackspace

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Transcript shadow - Rackspace

A photogram
is a fixed
shadow of a
3D three
dimensional
object on a
light
An x-ray is a photogram.
The real
breakthrough
for the
photogram
constitutes the
discovery of
the x-rays by
Conrad
Röntgen in
1895.
Bertha Roentgen's hand with a ring, produced on Friday, November 8, 1895
What is a shadow?
• A shadow is an area where direct light
from a light source cannot reach due to
obstruction by an object. It occupies all of
the space behind an opaque object with
light in front of it.
• Synonyms: shade, silhouette, outline,
dark, darkness, gloom, gloominess, dusk,
dimness
Examples of shadows
Examples of shadows
What is refraction?
Refraction is the
change in direction
of a wave due to a
change in its speed.
This is most
commonly observed
when a wave passes
from one medium to
another at an angle.
Examples of Refraction
This example shows a change in
direction and speed.
Student Photogram by Charles
White
Butterfly by Jessica Reyes
Napoleon Dynamite by Eric
Crumley
Untitled
Star bright