Class 11 Exam > Class 11 Questions > Select the correct statement(s).a)The ideal b...
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Select the correct statement(s).
- a)The ideal body, which emits and absorbs all frequencies is called a black body
- b)The exact frequency distribution of the emitted radiation from a black body depends upon its temperature
- c)The radiation emitted goes from a lower frequency to higher frequency as the temperature increases
- d)In vacuum, all types of electromagnetic radiation travel at the same speed
Correct answer is option 'A,B,C,D'. Can you explain this answer?
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Select the correct statement(s).a)The ideal body, which emits and abso...
(a) Correct
(b) As temperature increases, distribution of frequency (and energy) increases. Thus, correct.
(c) As temperature increases, radiation emitted is shifted to lower wavelength, i.e. higher frequency. Correct
(d) All types of radiations have same speed 3 x 108 ms-1. Correct
(b) As temperature increases, distribution of frequency (and energy) increases. Thus, correct.
(c) As temperature increases, radiation emitted is shifted to lower wavelength, i.e. higher frequency. Correct
(d) All types of radiations have same speed 3 x 108 ms-1. Correct
Most Upvoted Answer
Select the correct statement(s).a)The ideal body, which emits and abso...
The correct statement(s) are:
a) The ideal body, which emits and absorbs all frequencies is called a black body.
b) The exact frequency distribution of the emitted radiation from a black body depends upon its temperature.
c) The radiation emitted goes from a lower frequency to higher frequency as the temperature increases.
d) In a vacuum, all types of electromagnetic radiation travel at the same speed.
Explanation:
Black Body
A black body is an idealized physical body that absorbs and emits all frequencies of electromagnetic radiation. It is called a black body because it absorbs all incident radiation and does not reflect or transmit any light. In other words, it appears completely black.
Frequency Distribution of Emitted Radiation
The exact frequency distribution of the emitted radiation from a black body depends upon its temperature. This is known as the black body radiation spectrum. As the temperature of the black body increases, the peak of the radiation spectrum shifts to higher frequencies. This shift is known as Wien's displacement law, which states that the wavelength of maximum emission is inversely proportional to the temperature.
Increasing Temperature and Frequency
As the temperature of a black body increases, the radiation emitted shifts from lower frequencies to higher frequencies. This is known as the Stefan-Boltzmann law, which states that the total power radiated by a black body is directly proportional to the fourth power of its temperature. Therefore, as the temperature increases, the intensity of radiation at all frequencies increases, and the distribution shifts towards higher frequencies.
Electromagnetic Radiation in Vacuum
In a vacuum, all types of electromagnetic radiation, including visible light, radio waves, microwaves, infrared radiation, ultraviolet radiation, X-rays, and gamma rays, travel at the same speed. This speed is approximately 3 x 10^8 meters per second, which is often denoted as the speed of light, denoted by the symbol 'c'.
To summarize, the correct statements are that a black body emits and absorbs all frequencies, the frequency distribution of emitted radiation depends on its temperature, the radiation emitted goes from lower to higher frequencies as the temperature increases, and all types of electromagnetic radiation travel at the same speed in a vacuum.
a) The ideal body, which emits and absorbs all frequencies is called a black body.
b) The exact frequency distribution of the emitted radiation from a black body depends upon its temperature.
c) The radiation emitted goes from a lower frequency to higher frequency as the temperature increases.
d) In a vacuum, all types of electromagnetic radiation travel at the same speed.
Explanation:
Black Body
A black body is an idealized physical body that absorbs and emits all frequencies of electromagnetic radiation. It is called a black body because it absorbs all incident radiation and does not reflect or transmit any light. In other words, it appears completely black.
Frequency Distribution of Emitted Radiation
The exact frequency distribution of the emitted radiation from a black body depends upon its temperature. This is known as the black body radiation spectrum. As the temperature of the black body increases, the peak of the radiation spectrum shifts to higher frequencies. This shift is known as Wien's displacement law, which states that the wavelength of maximum emission is inversely proportional to the temperature.
Increasing Temperature and Frequency
As the temperature of a black body increases, the radiation emitted shifts from lower frequencies to higher frequencies. This is known as the Stefan-Boltzmann law, which states that the total power radiated by a black body is directly proportional to the fourth power of its temperature. Therefore, as the temperature increases, the intensity of radiation at all frequencies increases, and the distribution shifts towards higher frequencies.
Electromagnetic Radiation in Vacuum
In a vacuum, all types of electromagnetic radiation, including visible light, radio waves, microwaves, infrared radiation, ultraviolet radiation, X-rays, and gamma rays, travel at the same speed. This speed is approximately 3 x 10^8 meters per second, which is often denoted as the speed of light, denoted by the symbol 'c'.
To summarize, the correct statements are that a black body emits and absorbs all frequencies, the frequency distribution of emitted radiation depends on its temperature, the radiation emitted goes from lower to higher frequencies as the temperature increases, and all types of electromagnetic radiation travel at the same speed in a vacuum.
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Select the correct statement(s).a)The ideal body, which emits and absorbs all frequencies is called a black bodyb)The exact frequency distribution of the emitted radiation from a black body depends upon its temperaturec)The radiation emitted goes from a lower frequency to higher frequency as the temperature increasesd)In vacuum, all types of electromagnetic radiation travel at the same speedCorrect answer is option 'A,B,C,D'. Can you explain this answer?
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Select the correct statement(s).a)The ideal body, which emits and absorbs all frequencies is called a black bodyb)The exact frequency distribution of the emitted radiation from a black body depends upon its temperaturec)The radiation emitted goes from a lower frequency to higher frequency as the temperature increasesd)In vacuum, all types of electromagnetic radiation travel at the same speedCorrect answer is option 'A,B,C,D'. Can you explain this answer? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about Select the correct statement(s).a)The ideal body, which emits and absorbs all frequencies is called a black bodyb)The exact frequency distribution of the emitted radiation from a black body depends upon its temperaturec)The radiation emitted goes from a lower frequency to higher frequency as the temperature increasesd)In vacuum, all types of electromagnetic radiation travel at the same speedCorrect answer is option 'A,B,C,D'. Can you explain this answer? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Select the correct statement(s).a)The ideal body, which emits and absorbs all frequencies is called a black bodyb)The exact frequency distribution of the emitted radiation from a black body depends upon its temperaturec)The radiation emitted goes from a lower frequency to higher frequency as the temperature increasesd)In vacuum, all types of electromagnetic radiation travel at the same speedCorrect answer is option 'A,B,C,D'. Can you explain this answer?.
Select the correct statement(s).a)The ideal body, which emits and absorbs all frequencies is called a black bodyb)The exact frequency distribution of the emitted radiation from a black body depends upon its temperaturec)The radiation emitted goes from a lower frequency to higher frequency as the temperature increasesd)In vacuum, all types of electromagnetic radiation travel at the same speedCorrect answer is option 'A,B,C,D'. Can you explain this answer? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about Select the correct statement(s).a)The ideal body, which emits and absorbs all frequencies is called a black bodyb)The exact frequency distribution of the emitted radiation from a black body depends upon its temperaturec)The radiation emitted goes from a lower frequency to higher frequency as the temperature increasesd)In vacuum, all types of electromagnetic radiation travel at the same speedCorrect answer is option 'A,B,C,D'. Can you explain this answer? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Select the correct statement(s).a)The ideal body, which emits and absorbs all frequencies is called a black bodyb)The exact frequency distribution of the emitted radiation from a black body depends upon its temperaturec)The radiation emitted goes from a lower frequency to higher frequency as the temperature increasesd)In vacuum, all types of electromagnetic radiation travel at the same speedCorrect answer is option 'A,B,C,D'. Can you explain this answer?.
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ample number of questions to practice Select the correct statement(s).a)The ideal body, which emits and absorbs all frequencies is called a black bodyb)The exact frequency distribution of the emitted radiation from a black body depends upon its temperaturec)The radiation emitted goes from a lower frequency to higher frequency as the temperature increasesd)In vacuum, all types of electromagnetic radiation travel at the same speedCorrect answer is option 'A,B,C,D'. Can you explain this answer? tests, examples and also practice Class 11 tests.
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