Question Number 52052 by ajfour last updated on 02/Jan/19
Commented by ajfour last updated on 02/Jan/19
$${If}\:{a}\:{ray}\:{of}\:{light}\:{follows}\:{shown}\:{path} \\ $$$${getting}\:{reflected}\:{by}\:{inside}\:{of}\:{ellipse}, \\ $$$${find}\:{ellipse}\:{parameters}\:{a}\:{and}\:{b}\:{in} \\ $$$${terms}\:{of}\:\alpha\:\left({and}\:{unity}\right). \\ $$$${let}\:\alpha\:=\:\mathrm{45}°\:. \\ $$