CBSE Class 10 Physics chapter 11

1. Human Eye & the
Colourful World 🌎 ✨️
By Maithili Bhanushali, Grade10

2. Structure of Human Eye

3.  Cornea – Light enters the eye through a thin membrane. It forms a
transparent bulge on front surface of the eyeball. Most of the refraction
occurs here.
 Sclera – It is the outer covering, protective tough white layer.
 Eyeball – The eyeball is spherical in shape with a diameter of about 2.3cm
 Aqueous Humour – It is a fluid which fills the space between cornea & the
eye lens.
 Iris – It is a dark muscular diaphragm that controls the size of the pupil.

4.  Pupil – It is a small opening in the middle of the iris through which light enters
the eye.It regulates & controls the amount of light entering the eye.
 Lens – Behind the pupil, there is a transparent & flexible jelly-like structure
called lens.
 Ciliary muscles – They are capable of modifying the curvature of the lens &
affecting focal length of the lens.
 Vitreous Humour – This fluid helps the eye hold its shape, with light being
transmitted through it to the retina.
 Retina – It is a light sensitive screen on which the image is formed & converts
the image formed by the lens to electrical impulses.
 Optic Nerve – These are the nerves which take the image to the brain in the
form of electrical impulses.

6. Power Of Accommodation

7. Defects of Vision & their Correction
1) Myopia (near – sightedness)

8. 2)Hypermetropia(Far – sightedness)

9. 3)Presbyopia

10. Dispersion of white light by prism

11. Rainbow Formation 🌈

12. Atmospheric Refraction

14. Scattering Of Light

15. Why is the colour of the Sky Blue?