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作業五
Construct the envelope of the light rays emitted from
a radiant point source at infinity after reflection by the semi-circle.
Construct the envelope of the light rays emitted from
a radiant point source at the circumference after reflection by the same
circle.
Construct the envelope formed by a fix diameter of
a circle rolling along a straight line.
Construct the envelope formed by a fix diameter of a
circle rolling along a fixed circle of the same size.
Construct the envelope formed by a fix diameter of a
circle rolling along a fixed circle twice the diameter.
Construct this figure:
Construct this figure:
Construct this design:
Construct the nested squares as thus:
Constructed nested triangles as thus:
Construct this pattern:
Construct the family of ellipses
as t ranges in [0,1].
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Construct the concentric and coaxial ellipses of constant area:
Construct this pattern.
Construct this pattern.
Construct the reflections of a light ray trapped inside
a reflective ellipse. There are two cases.
The second Case
