Physics

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…

General objective of this lecture is to present on Real Images vs. Virtual Images. Real images are formed by mirrors or lenses when light rays actually converge…

Supernumerary arcs are faint arcs of color just inside the primary rainbow. They occur when the drops are of uniform size. If two light rays…

A rainbow is a spectrum formed when sunlight is dispersed by water droplets in the atmosphere. Sunlight incident on a water droplet is refracted. Because…

General purpose of this lecture is to present on Atmospheric Optics. There are many natural occurrences of light optics in our atmosphere. One of the most common…

Most things we see are thanks to reflections, since most objects don’t produce their own visible light. Much of the light incident on an object…

Dispersion is the separation of light into a spectrum by refraction. The index of refraction is actually a function of wavelength. For longer wavelengths the…

Lingering daylight after the sun is below the horizon is another effect of refraction. Light travels at a slightly slower speed in Earth’s atmosphere than…