MEDIUM
10th CBSE
IMPORTANT
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Define the term power of accommodation. Write the modification in the curvature of the eye lens which enables us to see the nearby objects clearly? 

Important Questions on Human Eye and Colourful World

MEDIUM
10th CBSE
IMPORTANT
Xamidea COMPLETE COURSE SCIENCE Class X>Chapter 11 - Human Eye and Colourful World>SELF-ASSESSMENT TEST>Q 6
What happens to a beam of white light when it gets refracted through a glass prism? Which colour deviates the most and the least after refraction through a prism? What is likely to happen if a second identical prism is placed in an inverted position with respect to the first prism? Justify your answer.
MEDIUM
10th CBSE
IMPORTANT
Xamidea COMPLETE COURSE SCIENCE Class X>Chapter 11 - Human Eye and Colourful World>SELF-ASSESSMENT TEST>Q 7
Explain with the help of diagram why the sun is visible to us two minutes before the actual sunrise and two minutes after the sunset.
MEDIUM
10th CBSE
IMPORTANT
Xamidea COMPLETE COURSE SCIENCE Class X>Chapter 11 - Human Eye and Colourful World>SELF-ASSESSMENT TEST>Q 8
What is "dispersion of white light"? Draw a labelled diagram to illustrate the recombination of the spectrum of white light. Why is it essential that the two prisms used for the purpose should be identical and placed in an inverted position with respect to each other?
MEDIUM
10th CBSE
IMPORTANT
Xamidea COMPLETE COURSE SCIENCE Class X>Chapter 11 - Human Eye and Colourful World>SELF-ASSESSMENT TEST>Q 9
Give reasons: The sky appears dark instead of blue to an astronaut in space.
MEDIUM
10th CBSE
IMPORTANT
Xamidea COMPLETE COURSE SCIENCE Class X>Chapter 11 - Human Eye and Colourful World>SELF-ASSESSMENT TEST>Q 9
Give reasons: The sky near the horizon appears to have a reddish hue at the time of sunset and sunrise.
MEDIUM
10th CBSE
IMPORTANT
Xamidea COMPLETE COURSE SCIENCE Class X>Chapter 11 - Human Eye and Colourful World>SELF-ASSESSMENT TEST>Q 9
Give reasons: The stars appear to twinkle.
MEDIUM
10th CBSE
IMPORTANT
Xamidea COMPLETE COURSE SCIENCE Class X>Chapter 11 - Human Eye and Colourful World>SELF-ASSESSMENT TEST>Q 10

Write the functions of each of the following parts of the human eye:

  1. Cornea                                                                                                                                                                                 
  2. Iris
  3. Crystalline (Eye) lens
  4. Ciliary muscles                                                                                                                                                                     
  5. Retina
MEDIUM
10th CBSE
IMPORTANT
Xamidea COMPLETE COURSE SCIENCE Class X>Chapter 11 - Human Eye and Colourful World>SELF-ASSESSMENT TEST>Q 10
A person is unable to see distinctly the objects closer than 1 m. Name the defect of vision he is suffering from. Draw ray diagrams to illustrate the cause of the defect and its correction by suitable lens.