Home
Class 10
PHYSICS
When we enter a dark room, pupil of our ...

When we enter a dark room, pupil of our eye ………………. .

A

contracts

B

expands

C

remains same

D

none of these

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • LENSES

    CHETAN PUBLICATION|Exercise Solve the following|10 Videos

  • LENSES

    CHETAN PUBLICATION|Exercise Define the following|19 Videos

  • LENSES

    CHETAN PUBLICATION|Exercise Answer the following in one sentence|12 Videos

  • HEAT

    CHETAN PUBLICATION|Exercise ASSIGNMENT - 5 (Answer the following: (Any 1))|3 Videos

  • MODEL ACTIVITY SHEET

    CHETAN PUBLICATION|Exercise SOLVE THE FOLLOWING QUESTIONS : (ANY 1)|9 Videos

Similar Questions

Explore conceptually related problems

When viewing through a compound microscope, our eyes should be positioned not on the eyepiece, but a short distance away from it for best viewing . why ? How much should be that short distance between the eye and eyepiece?

When lighting a bulba in a dark room, light spreads the whole room quickly. Give reason.

Name the processes by which air enters and comes out of our lungs ?

When we peel the skin of a potato tuber, we remove

Why does our mouth becomes watery when we eat the food of our choice ?

When we try to close a water tap with our fingers, fast jets of water gush through the openings between our fingers.

A room has 6 dorrs . In how many ways can a man enter the room through one door and come out through a different door ?

CHETAN PUBLICATION-LENSES-Choose and write the correct option:
  1. What is the distance of distinct vision?

    Text Solution

    |

  2. The power of a convex lens of focal length 50 cm is …………….

    Text Solution

    |

  3. The focal length of a concave lens with power -4D is ……………….

    Text Solution

    |

  4. If the incident ray passes through focus, then the reflected ray is ……...

    Text Solution

    |

  5. The image is formed on the ………..of the human eye.

    Text Solution

    |

  6. If an object is placed between F(1)" and " 2F(1) of a convex lens, the...

    Text Solution

    |

  7. When a person is myopia, he/she can clearly see .

    Text Solution

    |

  8. Hypermeteropia is corrected by lens.

    Text Solution

    |

  9. Convex lens of power +5" D " and concave lens with power -3" D "are pl...

    Text Solution

    |

  10. Simple microscope consists of

    Text Solution

    |

  11. The perception of dim light is concerned with …………….. cells.

    Text Solution

    |

  12. Impression of an image lasts on the retina for1/10 the of a second.

    Text Solution

    |

  13. The second focal point is located at ………………… of a human eye.

    Text Solution

    |

  14. For a Convex lens, if the incident ray is parallel to the principle ax...

    Text Solution

    |

  15. Inside water, an air bubble behaves ……………….

    Text Solution

    |

  16. To obtain an image of the same size as the object with the help of a c...

    Text Solution

    |

  17. At what distance should a watchmaker hold his lens from the watch?

    Text Solution

    |

  18. When we enter a dark room, pupil of our eye ………………. .

    Text Solution

    |