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 of these is the rainbow, which is caused by water droplets dispersing sunlight. Others include arcs, halos, cloud iridescence, and many more. Light playing on water drops, dust or ice crystals in the atmosphere produces a host of visual spectacles – rainbows, halos, glories, coronas and many more.