The Human Eye and the Colourful World

The Human Eye and Colourful World

SHORT ANSWER TYPE QUESTIONS (SAQ)

1. What is spectrum? Answer : When a white light is passed through a transparent medium, the white light splits int...

11. How does an eye focus the objects lying at various distances? Answer : An eye can focus the images of the dista...

21. How do we see colours? Answer : The retina of our eyes has many light-sensitive cells. These cells come in two...

31. What is Astigmatism? Answer : Astigmatism is the defect of an eye due to which a person cannot focus on both th...

41. What is dispersion? Answer : When white light goes through something clear like a glass prism, it separates int...

LONG ANSWER TYPE QUESTIONS (LAQ)

1. Which phenomenon of vision is made use of in cinematography? Explain briefly how it is used. Answer : In movies...

2. Explain presbyopia and astigmatism. Answer : As people age, their eyes naturally experience a condition called pr...

3. How is the terrestrial telescope different from the astronomical telescope? Answer : Terrestrial telescopes incl...

4. How will you distinguish between a compound microscope and a telescope. Answer : In a compound microscope, a sma...

NCERT SOLUTION

Page 164 1. What is meant by the power of accommodation of the eye? The power of accommodation of the...

Page 170 1. The human eye can focus on objects at different distances by adjusting the focal length of the...

Page 170 7. Make a diagram to show how hypermetropia is corrected. The near point of a hypermetropic eye i...

Page 170 8. Why is a normal eye not able to see clearly the objects placed closer than 25 cm?...