Brenden Sener creates a miniature model with four mirrors and heat lamp, which proves Archimedes' theory is plausible.

Sener has since earned multiple medals for his attempt to bring the ancient device to life. In his view, he as shown that ...

In Sener’s attempt at the ray, he set up a heating lamp facing four small concave mirrors, each tilted to direct light at a piece of cardboard with an X marked at the focal point.

Rules for obtaining images formed by concave mirror. Rule 1: When a ray of light which is parallel to the principal axis gets reflected, it passes through its focus. Rule 2: ...

Unintentionally, it focuses the rays of the sun to such high intensity, birds flying through its path can be burned to death. Humans coming in contact with the light could be blinded.

Concave mirrors are sort of like parabolic dishes, in that the parallel light rays bounce off the curved-in surface and bounce to the focal point, which you can picture as being where the center ...

Now light rays from sun rays after reflection from concave mirror will converge at focus. It is given that sunrays converge at 15 cm. So, focal length of the mirror = f = 15 cm.

Scientists use concave mirrors in large telescopes. On the other hand, convex mirrors are thinner in the middle and bend light outward. Drivers use convex mirrors in their side mirrors.