NCERT Solutions for Class 10 Science Chapter 11 The Human Eye and Colorful World

Science Chapter 11 Human Eye and Colourful World focuses on the human eye and various phenomena of lights. Light enables a human being to see the world around him. The most fundamental part required for a human being to see any object is the Eye. The Eye is one of the most important sense organs in the human body. The human eye acts like a camera for our body. The eye collects images around us and feeds these images to the brain. The structure of the eye is like the structure of a camera. It consists of a cornea, iris, pupil, ciliary muscles, lenses, retina, and optic nerve. These parts function together for the human eye to see the things outside. Some of the interesting topics you will study in this chapter are Defects of Vision and their Correction, Refraction of Light Through a Prism, Atmospheric Refraction, and Scattering of Light.

This chapter also talks about various eye conditions and defects. The eye can accommodate and acclimate to any distance. This is possible due to the ciliary muscles, which adjust the lens accordingly. When this power of accommodation fails, the lens is unable to adjust itself, due to which the images look blurry and distorted. This causes 3 common conditions in the human eye, Myopia, hypermetropia and presbyopia. These conditions are corrected with the help of spectacles. These spectacles consist of a pair of either concave lenses, convex lenses or both, depending on the condition of the eye.

Further, in Science Chapter 11, human eye and colourful world, various phenomena like the rainbow are explained. Refraction causes many phenomena, one of them being the formation of the spectrum. A spectrum consists of 7 colours of light with different bandwidths. This happens when white light is passed through a rectangular prism. The prism separates this white light, and then these 7 colours are formed.

Many space-related phenomena, such as the twinkling of stars, the sun appears reddish during the evening, etc., are possible due to the refraction of light. The light is refracted through the atmosphere. This atmospheric refraction makes these phenomena possible.