Home
Class 7
PHYSICS
Why can the sun's heat not reach the ear...

Why can the sun's heat not reach the earth by conduction or convection ?

Text Solution

Verified by Experts

Conduction of heat takes place through matter. Convection is taking place in fluid(gas or liquid) due to density and temperature differences. Between earth and sun,we have atmosphere cover surrounding the earth upto 100 km from earth's surface. After that we have only vacuum between atmosphere and sun. Hence heat from sun can not reach earth by conduction and convection. Heat from the sun can reach only through radiation that does not need any medium to transfer energy.
Promotional Banner

Topper's Solved these Questions

  • Electric Current And its Effects

    LAKHMIR SINGH & MANJIT KAUR|Exercise EXERCISE|101 Videos

  • LIGHT

    LAKHMIR SINGH & MANJIT KAUR|Exercise EXERCISEE|130 Videos

Similar Questions

Explore conceptually related problems

How does the heat from the sun reach the earth ?

Look at Figure. Mark where the heat is being transferred by conduction, by convection and by radiation.

Look at the Figure given alongside. Mark where the heat is being transferred by conduction, by convection, and by radiation.

What are the basic differences between , conduction, convection and radiation?

Statement-1 : Heat from the sun reaches the earth by convection. Statement-2 : Air can be heated only by convection

In a thermos flask, heat loss by conduction and convection can be avoided by

The sun heats the earth through_______

Introduction OF convection||Conduction

LAKHMIR SINGH & MANJIT KAUR-HEAT-EXERCISE
  1. Define temperature ? Name the device which is used to measure temperat...

    Text Solution

    |

  2. Give the similarities and differences between the clinical thermometer...

    Text Solution

    |

  3. Why can the sun's heat not reach the earth by conduction or convection...

    Text Solution

    |

  4. Explain how, woollen clothes keep us warm during cold winter days. Dis...

    Text Solution

    |

  5. What is a clinical thermometer ? What is the range of a clinical therm...

    Text Solution

    |

  6. Explain how, the water in a beaker gets heated when a burner is kept b...

    Text Solution

    |

  7. Explain how all the air in a room gets heated when a room heater kept ...

    Text Solution

    |

  8. Describe the blowing of sea-breeze and land-breeze in coastal areas .

    Text Solution

    |

  9. Why do people prefer to wear white clothes in summer ?

    Text Solution

    |

  10. Why is it better to wear dark clothes in winter ?

    Text Solution

    |

  11. What is a thermometer ? Name the thermometer used by doctors and nurse...

    Text Solution

    |

  12. Can we use a laboratory thermometer to measure human body temperature ...

    Text Solution

    |

  13. Why is the box of a solar cooker painted black from inside ?

    Text Solution

    |

  14. In places of hot climate, it is advised that the outer walls of houses...

    Text Solution

    |

  15. What is meant by 'convection' ? Explain with the help of an example. W...

    Text Solution

    |

  16. Define radiation. Give any two examples where heat is transferred by r...

    Text Solution

    |

  17. A person bought a book at 20% discount and sold it at 10% discount. In...

    Text Solution

    |

  18. Stainless steel cooking pans are preferred with extra copper bottoms. ...

    Text Solution

    |

  19. A wooden spoon is dipped in a cup of ice cream. Its other end

    Text Solution

    |

  20. The device used to measure temperature is

    Text Solution

    |