(B) According to Kirchhoff's law of radiation,good absorbers are also good emitters. Black surfaces have the highest emissivity and absorptivity compa

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(B) According to Kirchhoff's law of radiation,good absorbers are also good emitters. Black surfaces have the highest emissivity and absorptivity compared to gray or white surfaces. Since all objects are at the same temperature of $2000\,^oC$,the object with the highest emissivity will emit the maximum amount of radiation per unit area. Therefore,the black object will glow the brightest.

Class 11 Physics 10-2.Heat Transfer Radiation (General, Kirchoff's law, Black body, Prevost's Theory)

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Three objects colored black,gray,and white can withstand hostile conditions up to $2800\,^oC$. These objects are thrown into a furnace where each of them attains a temperature of $2000\,^oC$. Which object will glow brightest?

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A
the white object
B
the black object
C
all glow with equal brightness
D
gray object

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Class 11

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Chapter

10-2.Heat Transfer

Subtopic

Radiation (General, Kirchoff's law, Black body, Prevost's Theory)

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If $E$ is the total energy emitted by a body at temperature $T \ K$ and $E_{max}$ is the maximum energy emitted by it at the same temperature,then:

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There is a rough black spot on a polished metallic plate. It is heated up to $1400 K$ approximately and then at once taken into a dark room. Which of the following statements is true?

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Half part of an ice block is covered with a black cloth and the rest half is covered with a white cloth,and then it is kept in sunlight. After some time,the clothes are removed to observe the melted ice. Which of the following statements is correct?

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According to Kirchhoff's law,the ratio of emissive power to absorptive power for all bodies is:

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Three objects colored black,gray,and white can withstand hostile conditions up to $2800\,^oC$. These objects are thrown into a furnace where each of them attains a temperature of $2000\,^oC$. Which object will glow brightest?

Similar Questions

Why do we wear white or light-coloured clothes in summer and dark-coloured clothes in winter?

If $E$ is the total energy emitted by a body at temperature $T \ K$ and $E_{max}$ is the maximum energy emitted by it at the same temperature,then:

There is a rough black spot on a polished metallic plate. It is heated up to $1400 K$ approximately and then at once taken into a dark room. Which of the following statements is true?

Half part of an ice block is covered with a black cloth and the rest half is covered with a white cloth,and then it is kept in sunlight. After some time,the clothes are removed to observe the melted ice. Which of the following statements is correct?

According to Kirchhoff's law,the ratio of emissive power to absorptive power for all bodies is:

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