Light Energy II - JSS2 Basic science Past Questions and Answers - page 1

Vision is the ability of an organism to interpret the surrounding environment through the sense of sight. It is important because it allows individuals to perceive shapes, colors, depth, and movement, which are crucial for various activities such as navigation, communication, and survival.

Dispersion occurs when light is separated into its constituent colors as it passes through a medium, such as a prism or water droplets. This separation happens because different wavelengths of light bend by different amounts when they enter a medium, causing them to spread out. Dispersion leads to the formation of a rainbow, a natural optical phenomenon, when sunlight is dispersed and refracted by water droplets in the atmosphere, typically after a rain shower.