Many nocturnal animals demonstrate the phenomenon of eyeshine, in which their eyes glow various colors at night when ill

[answerhappygod]

Many nocturnal animals demonstrate the phenomenon of eyeshine,
in which their eyes glow various colors at night when illuminated
by a flashlight or the headlights of a car (see the photo). Their
eyes react this way because of a thin layer of reflective tissue
called the tapetum lucidum that is located
directly behind the retina. This tissue reflects the light back
through the retina, which increases the available light that can
activate photoreceptors, and thus improve the animal’s vision in
low-light conditions. If we assume the tapetum lucidum acts like a
concave spherical mirror with a radius of curvature of 0.750 cm,
how far in front of the tapetum lucidum would an image form of an
object located 30.0 cm away? Neglect the effects of the other
structures of the eye, such as the cornea and lens.