Figure 34. Beams reflecting on the surface of the parabola and crossing its focus and beams reflecting on the surface of the branch of the hyperbola and crossing one of its foci

From

The Experimental Teaching of the Conics Using the Reflection of the Light: The Conceptual Study of the Cassegrain Telescope

Juan Carlos Ruiz Mendoza

American Journal of Educational Research. 2019, 7(10), 699-707 doi:10.12691/education-7-10-5