Home
Class 8
PHYSICS
Discuss we feel strain in our eyes if we...

Discuss we feel strain in our eyes if we watch television or read a book from a very close distance?

Text Solution

Verified by Experts

Near distance for a normal eye is 25 cm. If we watch TV or read a book from a distance closer than 25 cm, the eye lens gets stretched to focus on the light falling on it to get a clear view of the image. Hence, we feel a strain in our eyes.
Promotional Banner

Topper's Solved these Questions

  • LIGHT

    PEARSON IIT JEE FOUNDATION|Exercise CLASSROOM CORNER (C. Long Answer Type Questions )|15 Videos

  • LIGHT

    PEARSON IIT JEE FOUNDATION|Exercise COMPETITION CORNER|59 Videos

  • LIGHT

    PEARSON IIT JEE FOUNDATION|Exercise CLASSROOM CORNER (A. Very Short Answer Type Questions) ( Assertion - Reason Type - Questions)|4 Videos

  • KINEMATICS

    PEARSON IIT JEE FOUNDATION|Exercise CONCEPT APPLICATION (Level 3) (Application Based Questions ) |5 Videos

  • MAGNETISM

    PEARSON IIT JEE FOUNDATION|Exercise CONCEPT APPLICATION (Level 3)|4 Videos

Similar Questions

Explore conceptually related problems

How do we feel force in our daily life?

Try this. i. Try to read a book keeping it very far from your eyes. ii. Try to read a book keeping it very close to your eyes. iii. Try to read a book keeping it at a distance of 25 cm from your eyes. At which time you see the alphabets clearly? Why?

Assertion: The image distance in the eye increases, when we increase the distance of an object from the eye. Reason: For normal eye, image distance in the eye is fixed, being equal to distance of retina from the eye lens. The focal length of the eye lens is changed on account of accommodation power of the eye.

Answer the following question. When we pick up a newspaper, a book, or an article, we come to our task with certain preconceptions and predispositions. We expect to find a specific piece of information or be presented with an argument or an analysis of something, say, the likelihood of recession in the next six months or the reasons why children can't read. We probably know a little about the book or article we are reading even before we start. There was, after all, some reason why we chose to read one piece of writing rather than another. Our expectations and predispositions may, however, blind us to what the article and its author is actually saying. If, for example, we are used to disagreeing with the author, we may see only what we expect to see and not what is actually there. Our expectations and predispositions may, however, blind us because

PEARSON IIT JEE FOUNDATION-LIGHT-CLASSROOM CORNER (B. Short Answer Type Questions )
  1. Explain how the Braille system is used to help visually challenged pe...

    Text Solution

    |

  2. What is multiple reflection How can you view your hairstyle at the ba...

    Text Solution

    |

  3. Draw a diagram showing the formation of the image of an object placed...

    Text Solution

    |

  4. Explain why we cannot see our image on a wooden table or a book.

    Text Solution

    |

  5. Discuss we feel strain in our eyes if we watch television or read a bo...

    Text Solution

    |

  6. We cannot see a non-luminous object with out the presence of a source ...

    Text Solution

    |

  7. When we look at an object, an inverted diminished image of an object i...

    Text Solution

    |

  8. Some animals such as owls have better vision than us in the dark. Whic...

    Text Solution

    |

  9. A board with the word MIRROR written on it is placed 3 m in front of ...

    Text Solution

    |

  10. Defects of vision such as myopia and hypermetropia are corrected by th...

    Text Solution

    |

  11. Discuss the below points: (a) Image (b) Diffuse reflection (c)...

    Text Solution

    |

  12. Suppose you are in a dark room. Can you see objects in the room? Can y...

    Text Solution

    |

  13. Differentiate between regular and diffused reflection. Does diffused r...

    Text Solution

    |

  14. Two mirrors meet at right angles. A ray of light is incident on one at...

    Text Solution

    |

  15. Give the ray diagram showing reflection of light

    Text Solution

    |

  16. Fill in the blank in A person 1 m in front of a plane mirror seems t...

    Text Solution

    |

  17. Fill in the blank in If you touch your ear with your right hand in ...

    Text Solution

    |

  18. Fill in the blank in The size of the pupil becomes when you see in...

    Text Solution

    |

  19. How should we care our eyes? Write any three.

    Text Solution

    |

  20. What is the nature of image formed on the retina of human eye of an ob...

    Text Solution

    |