Home
Class 11
PHYSICS
The colour of a star indicates its...

The colour of a star indicates its

A

temperature

B

distance

C

velocity

D

size

Text Solution

Verified by Experts

The correct Answer is:
A
According to weins displacement law, `lambda_(m)T`=constant or temperature `prop 1/(lambda_(m))`. It represents that greater the temperature T of an emitted star, smaller the value of wave length `lambda`, we also know the wave length of ray depends upon its colour. hence, when the temperature of star increases, the wave length of star decreases. when temperature of star decreases, thewave length increases and star moves towards the red colour therefore, the colour of star indicates its temperature.
Promotional Banner

Topper's Solved these Questions

  • HEAT TRANSFER

    RESONANCE|Exercise Exercise-3|1 Videos

  • HEAT TRANSFER

    RESONANCE|Exercise Advancel Level Problems|17 Videos

  • HEAT TRANSFER

    RESONANCE|Exercise Exercise-2|1 Videos

  • GRAVITATION

    RESONANCE|Exercise Exercise|21 Videos

  • KINEMATICS

    RESONANCE|Exercise Exercise|65 Videos

Similar Questions

Explore conceptually related problems

The colour of a star is a measure of its .

The colour of a star depends upon its

A certain solution does not change the colour of any indicator. This solution is most likely to be :

Yellow colour of the flame indicates

A solution changes the colour of turmeric indicator from yellow to red . The solution is

Colour of a star depends upon

An acid indicator is represented by Hl_(n).(K_(a)=10^(-5)) . The range of change of colour for the indicator is

The colours of stars depend on their

RESONANCE-HEAT TRANSFER-Exercise
  1. Two plates each of area A, thickness L1 and L2 thermal conductivities ...

    Text Solution

    |

  2. Consider a compound slab consisting of two different material having e...

    Text Solution

    |

  3. A square is made of four rods of same material one of the diagonal of ...

    Text Solution

    |

  4. If the temperature difference on the two sides of a wall increases fro...

    Text Solution

    |

  5. The colour of a star indicates its

    Text Solution

    |

  6. The means of energy transfer in vacuum is:

    Text Solution

    |

  7. Which of the following is nearest to blackbody-

    Text Solution

    |

  8. Which of the following is true statement?

    Text Solution

    |

  9. For a black body at temperature 727^@C, its radiating power is 60 watt...

    Text Solution

    |

  10. According to Wien's law

    Text Solution

    |

  11. If lambda(m) denotes the wavelength at which the radiative emission fr...

    Text Solution

    |

  12. A black body at 1227^(@)C emits radiations with maximum intensity at a...

    Text Solution

    |

  13. The energy radiated by a black body is directly proportional to :

    Text Solution

    |

  14. If temperature becomes double, the emitted radiation will be :

    Text Solution

    |

  15. Prevost's theory of heat exchange tells that a body radiates thermal e...

    Text Solution

    |

  16. Reflection and absorption coefficient of a given surface at 0^@C for a...

    Text Solution

    |

  17. A black metal foil is warmed by radiation from a small sphere at tempe...

    Text Solution

    |

  18. A body takes 10 min to cool douwn from 62^@C to 50^@C. If the temperat...

    Text Solution

    |

  19. Two circular disc A and B with equal radii are blackened. They are hea...

    Text Solution

    |

  20. According to Newton's law of cooling, the rate of cooling of a body is...

    Text Solution

    |