雙曲線的光學性質
Author: 藍邦偉　老師

 雙曲線的光學性質

D: Corner[4.0] + (7.0, 0.0)
E: D - (0.0, 1.5)
F = (5, 0)
F' = (-5, 0)
t = 2.303834612632515 rad (slider from 0 to 6.283185307179586, step 0.003490658503988659)
P: (4.0 / cos(t), 3.0 * tan(t))
u = Vector(F, P)
a = Line(P, F')
b, f = Tangent(P, c)
d = Segment(P, F')
e: x = x(Corner[2.0])
A = Intersect(a, e)
q = Vector(P, A)
v: x = x(Corner[1.0])
g = Segment(P, F)
h = Line(P, F)
B = Intersect(v, h)
w = Vector(P, B)
z = Vector(F', P)
C = Corner(4.0)
G: (x(Corner[1.0]), y(E))
多邊形1, c_1, d_1, e_1, g_1 = Polygon(C, D, E, G)
i = Vector((x(Corner[1.0]), 0.0), (x(Corner[3.0]), 0.0))
j = Vector((0.0, y(Corner[1.0])), (0.0, y(Corner[3.0])))