MEDIUM
10th CBSE
IMPORTANT
Earn 100

Give reasons: The sky appears dark instead of blue to an astronaut in space.

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 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.
MEDIUM
10th CBSE
IMPORTANT
Xamidea COMPLETE COURSE SCIENCE Class X>Chapter 11 - Human Eye and Colourful World>SELF-ASSESSMENT TEST>Q 11
A person is unable to see distinctly the words printed on a newspaper. Name the defect of vision he is suffering from. Draw ray diagram to illustrate this defect. List its two possible causes. Draw a ray diagram to show how this defect may be corrected using a lens of appropriate focal length.