Home
Class 12
PHYSICS
Three objects coloured black, gray and w...

Three objects coloured black, gray and white can withstand hostile conditions upto `2800^(@)C`. These objects are thrown into a furance where each of them attains a temperature of `2000^(@)C`. Which object will glow brightest?

A

white object

B

Black object

C

All glow with same brightness

D

Grey object

Text Solution

Verified by Experts

The correct Answer is:
C
Ultimately all reflect radiation .
Promotional Banner

Topper's Solved these Questions

  • MOCK TEST 1

    CAREER POINT|Exercise PART (B) - CHEMISTRY|29 Videos

  • MAJOR TEST

    CAREER POINT|Exercise PHYSICS|30 Videos

  • MOCK TEST 10

    CAREER POINT|Exercise PART (B) - CHEMISTRY|30 Videos

Similar Questions

Explore conceptually related problems

There obujects coloured black, gray and white can withstand hostile condition upto 2800^(@)C These object are throw into a farance where each of them attanit a temperature of 2800^(@)C Which object will glow brightess?

Three objects sphere , a cube and a circular plate of equal mass are constructed from same material . All of the three objects are initially heated to a temperature of 150^@C and then left to cool at room temperature. Will they all cool down at the same ? If not, which of them will cool faster and why ?

Four copper plates of the same dimensions are painted with red, green, white and black colours. All of them are heated upto a temperature of 300^(@)C and then allowed to cool in the surrounding, which is at room temperature. Which plate would cool at the earliest?

A man standing on sea-shore sees an elongated image (shown by dashed line) of a floating object AB. In fact he finds the image to be oscillating due to air turbu- lence. Figure (ii) gives three plots (a, b and c) of height from the water surface vs air temperature. Which one best illustrates the air-temperature condition that can create this image? [Many people have seen sea monsters due to this phenomena!]

If n objects are arrange in a row,then the number of ways of selecting three of these objects so that no two of them are next to each other is a.^(n-2)C_(3) b.^(n-3)C_(2) c.^(n-3)C_(3) d.none of these

Two solid bodies of equal mass m initially at T = 0^(@)C are heated at a uniform and same rate under identical conditions. The temperature of the first object with latent heat L_(1) and specific heat capacity in solid state C_(1) changes according to graph 1 on the diagram. the temperature of the second object withe latent heat L_(2) and specific heat capacity in solid state C_(2) changes according to graph 2 on the diagram. based on what is shown on the graph, the latent heat L_(1) and L_(2) and the specific heat capacities C_(1) and C_(2) in solid state obey which of the following relationships?

In the following question, two columns are given, containing a connector and three phrases each. In the first column, the phrases are A, B and C and in the second column, the phrases are D, E and F. You have to make meaningful sentences using the connectors and from the phrases of both the columns. There are five options, four of which display the sequence(s) in which the phrases with the connectors can be joined to form a grammatically and contextually correct sentence. Incidentally I. (A) The objective for development should (B) I have found the item in the supermarket (C) The school cricket team did not get disheartened by the initial setback II (D) encourage the development of industries and on the other hand ensure the preservation of the environment. (E) she performed poorly in the English test. (F) I met Mrs Anamika, an old classmate of mine, there.

CAREER POINT-MOCK TEST 1-PART (B) - CHEMISTRY
  1. Three objects coloured black, gray and white can withstand hostile con...

    Text Solution

    |

  2. Which method of purificationis represented by the following equations ...

    Text Solution

    |

  3. A fire work gave brick red colour . It probably contained a salt of -

    Text Solution

    |

  4. About H(2)SO(4) , which of the following statements is incorrect ?

    Text Solution

    |

  5. The property of halogen acids , that indicated incorrect is -

    Text Solution

    |

  6. Which of the following will be the major product when 3 - phenylpropen...

    Text Solution

    |

  7. The major product formed in the reaction is - CH(3)CHClCH(2)CH(2)OH ...

    Text Solution

    |

  8. Consider the following sequence of reactions . The final product ...

    Text Solution

    |

  9. For the redox reaction , MnO(4)^(-) + C(2)O(4)^(-2) + H^(+) to Mn^...

    Text Solution

    |

  10. The density of gas A is twice that of B at the same temperature the mo...

    Text Solution

    |

  11. I(2)(s)|I^(-)(0.1M) half cell is connected to a H^(+) (aq)|H(2)(1 bar)...

    Text Solution

    |

  12. Which of the following statement is/are correct ? I . The ligand th...

    Text Solution

    |

  13. A six coordination complex of formula CrCl(3)*6H(2)O has green colour....

    Text Solution

    |

  14. Which one of the following ions exhibit highest magnetic moment ?

    Text Solution

    |

  15. Which of the following gaseous molecule is non-linear ?

    Text Solution

    |

  16. Select incorrect order

    Text Solution

    |

  17. In psi(321), the sum of angular momentum, spherical nodes and angular ...

    Text Solution

    |

  18. A solid is formed and it has three types of atoms X, Y and Z, X forms ...

    Text Solution

    |

  19. The heat of formation of NH(3)(g) is -46 " kJ mol"^(-1). The DeltaH (i...

    Text Solution

    |

  20. NH(4)HS(s)hArrNH(3)(g)+H(2)S(g) The3 equilibrium pressure at 25^(@)C ...

    Text Solution

    |

  21. Calculate depression of freezing point for 0.56 molal aq. Solution of ...

    Text Solution

    |