The Human Eye and the Colourful World

Topics in this chapter

• Human Eye Structure and Vision
• Accommodation and Vision Defects
• Refraction Through Lenses and Prisms
• Dispersion and Rainbow Formation
• Atmospheric Refraction Phenomena
• Scattering of Light and Colour Effects

Cheat sheet

Practice questions

1. Question 1Q-3BEC57

   Which part of the human eye controls the amount of light entering it by adjusting its size?

   1. A.Ciliary muscles
   2. B.Pupil
   3. C.Iris
   4. D.Retina
   See the answer and solution
2. Question 2Q-55316D

   A person cannot see objects distinctly placed beyond 2 m. Which defect of vision is he suffering from and which lens is required to correct it?

   See the answer and solution
3. Question 3Q-4E6329

   The splitting of white light into its constituent colours when it passes through a glass prism is called:

   1. A.Reflection
   2. B.Scattering
   3. C.Dispersion
   4. D.Refraction
   See the answer and solution
4. Question 4Q-3E85D2

   Why do stars twinkle at night, while planets do not?

   See the answer and solution
5. Question 5Q-442CE6

   The phenomenon responsible for the majestic blue colour of clear sky is:

   1. A.Reflection of light by dust particles
   2. B.Refraction of light through water droplets
   3. C.Dispersion of light by air molecules
   4. D.Scattering of light by atmospheric molecules
   See the answer and solution