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

The white object

B

The black object

C

All glow with equal brightness

D

They gray object

Text Solution

Verified by Experts

The correct Answer is:
B
An ideal black body absorbs all the radiations incident upon it and has an emissivity equal to 1. If a black are kept at the same temperature, then the black body will radiate maximum power.
Hence, the black object at a temperature of `2000^(@)C` will glow brightest.
Promotional Banner

Topper's Solved these Questions

  • PRACTICE SET 15

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise PAPER 1 (PHYSICS & CHEMISTRY )|50 Videos

  • PRACTICE SET 17

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise PHYSICS & CHEMISTRY|50 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.

MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-PRACTICE SET 16-Paper -1 (Physics & Chemistry)
  1. Which of the following diagrams represent the veriation of electric fi...

    Text Solution

    |

  2. The circuit given below represents which of the logic operations?

    Text Solution

    |

  3. Three objects coloured black, gray and white can withstand hostile con...

    Text Solution

    |

  4. The measure of the diameter of a cylinder is (1.60 pm 0.01) cm and it...

    Text Solution

    |

  5. A screen is placed 50 cm from a single slit, which is illuminated with...

    Text Solution

    |

  6. Two simple harmonic motions of angular frequency 100 rad s^(-1) and 10...

    Text Solution

    |

  7. A ball whose density is 0.4 xx 10^3 kg//m^3 falls into water from a h...

    Text Solution

    |

  8. The first line of the lyman series in a hydrogen spectrum has a wavele...

    Text Solution

    |

  9. The de-Broglie wavelength of an electron in 4th orbit is (where, r=rad...

    Text Solution

    |

  10. A wire 3 m is length and 1 mm is diameter at 30^(@)C is kept in a low ...

    Text Solution

    |

  11. A soap bubble of radius r si blown up to form of bubble of radius 3r ...

    Text Solution

    |

  12. A metal plate of area 10^(3)" "cm^(2) rests on a layer o oil 6 mm thic...

    Text Solution

    |

  13. Two strings A and B of lengths, L(A)=80 cm and L(B)=x cm respectively ...

    Text Solution

    |

  14. Two cells, having the same emf, are connected in series through an ext...

    Text Solution

    |

  15. A bucket full of hot water cools from 75^(@)C to 70^(@)C in time T(1),...

    Text Solution

    |

  16. A long holow copper tube carries a current I. Then, which of the follo...

    Text Solution

    |

  17. Find the magnetic potential at a point and distance of 1m from the cen...

    Text Solution

    |

  18. An inducatane L and a resistance R are connected in series with a batt...

    Text Solution

    |

  19. Two plane mirrors are inclined to each other such that a ray of light ...

    Text Solution

    |

  20. A galvanometer has a current sensitivity of 4 div/microampere. If the ...

    Text Solution

    |