Ray

Qualified name: manim\_physics.optics.rays.Ray

class Ray(start, direction, init_length=5, propagate=None, **kwargs)

Bases: Line

A light ray.

Parameters:

• start (Iterable[float]) – The start point of the ray

• direction (Iterable[float]) – The direction of the ray

• init_length (float) – The initial length of the ray. Once propagated, the length are lengthened to showcase lensing.

• propagate (Iterable[Lens] | None) – A list of lenses to propagate through.

Example

Example: RayExampleScene

from manim import *

from manim_physics import *

class RayExampleScene(Scene):
    def construct(self):
        lens_style = {"fill_opacity": 0.5, "color": BLUE}
        a = Lens(-5, 1, **lens_style).shift(LEFT)
        a2 = Lens(5, 1, **lens_style).shift(RIGHT)
        b = [
            Ray(LEFT * 5 + UP * i, RIGHT, 8, [a, a2], color=RED)
            for i in np.linspace(-2, 2, 10)
        ]
        self.add(a, a2, *b)

from manim_physics import *

class RayExampleScene(Scene):
    def construct(self):
        lens_style = {"fill_opacity": 0.5, "color": BLUE}
        a = Lens(-5, 1, **lens_style).shift(LEFT)
        a2 = Lens(5, 1, **lens_style).shift(RIGHT)
        b = [
            Ray(LEFT * 5 + UP * i, RIGHT, 8, [a, a2], color=RED)
            for i in np.linspace(-2, 2, 10)
        ]
        self.add(a, a2, *b)

Methods

propagate

Let the ray propagate through the list of lenses passed.

Attributes

animate	Used to animate the application of any method of self.
animation_overrides
color
depth	The depth of the mobject.
fill_color	If there are multiple colors (for gradient) this returns the first one
height	The height of the mobject.
n_points_per_curve
sheen_factor
stroke_color
width	The width of the mobject.

propagate(*lenses)

Let the ray propagate through the list of lenses passed.

Parameters:

lenses (Lens) – All the lenses for the ray to propagate through

Return type:

None