Physics

Christiaan Huygens, a contemporary of Newton, was an advocate of the wave theory of light. Huygen’s principle states that a wave crest can be thought…

This lecture introduce on Concave Mirrors. A curved mirror is a mirror with a curved reflecting surface. One advantage that mirror optics have over lens optics is that mirrors do not introduce chromatic…

Galileo was the first to use a refracting telescope for astronomy. It is difficult to make large refracting telescopes, though, because the objective lens becomes…

Refracting telescopes are comprised of two convex lenses. The objective lens collects light from a distant source, converging it to a focus and forming a…

Primary objective of this lecture is to present on Human Eye: Hyperopia and Myopia. The human eye is a fluid-filled object that focuses images of objects on…

Principle objective of this lecture is to present on Chromatic Aberration. As in a raindrop or a prism, different wave-lengths of light are refracted at different angles…

Major objective of this lecture is to present on Convex Lens in Water. Since water has a higher index of refraction than air, a convex lens made…

Prime objective of this lecture is to present on Concave Lenses. A convex lens is a diverging lens. When parallel rays of light pass through a concave lens the refracted rays diverge…

The aim of this lecture is to present on Convex Lenses. A convex lens is a diverging lens. When parallel rays of light pass through a concave lens the refracted rays diverge…

Lenses are made of transparent materials, like glass or plastic, that typically have an index of refraction greater than that of air. Each of a…

Basic objective of this lecture is to present on Convex Mirrors. Convex mirrors reflect light outwards, therefore they are not used to focus light. A convex mirror has the…

Only parallel rays close to the principal axis of a spherical mirror will converge at the focal point. Rays farther away will converge at a…