Podcast
Questions and Answers
What is the main characteristic of thermal radiation?
What is the main characteristic of thermal radiation?
- Speed is slower than sound
- Transfers heat without heating the medium (correct)
- Travels through mediums
- Travels in a zigzag path
Which statement is true about the properties of thermal radiation?
Which statement is true about the properties of thermal radiation?
- It does not follow the law of inverse square
- Does not exhibit any wave characteristics
- Travels through empty space with the velocity of light (correct)
- Travels at a speed slower than light
Why is a perfectly black body called perfect absorber and perfect radiator?
Why is a perfectly black body called perfect absorber and perfect radiator?
- It reflects all incident radiation
- It only absorbs infrared radiation
- It absorbs all radiation and emits radiations of all possible wavelengths (correct)
- It doesn't absorb any radiation
What type of radiation is thermal radiation in terms of wavelength?
What type of radiation is thermal radiation in terms of wavelength?
According to Kirchhoff's Law, what is the relationship between emissive power and absorptive power for a given wavelength and temperature?
According to Kirchhoff's Law, what is the relationship between emissive power and absorptive power for a given wavelength and temperature?
What happens to the energy that is not absorbed by the surface in the described scenario?
What happens to the energy that is not absorbed by the surface in the described scenario?
In the equilibrium state, what is the relationship between absorptive power and emissive power?
In the equilibrium state, what is the relationship between absorptive power and emissive power?
What characteristic of the hole 'O' allows it to act as a black body radiator in the scenario described?
What characteristic of the hole 'O' allows it to act as a black body radiator in the scenario described?
Which law describes the relation between energy density and wavelength for shorter wavelengths?
Which law describes the relation between energy density and wavelength for shorter wavelengths?
In the context of the text, what happens when e λT ≫ 1?
In the context of the text, what happens when e λT ≫ 1?
Which law applies to the relation between energy density and wavelength for longer wavelengths?
Which law applies to the relation between energy density and wavelength for longer wavelengths?
How is the value of the constant described in the text in CGS units?
How is the value of the constant described in the text in CGS units?
What instrument was used to measure the black body's temperature according to the text?
What instrument was used to measure the black body's temperature according to the text?
What happens to the intensity of heat radiation as the wavelength increases?
What happens to the intensity of heat radiation as the wavelength increases?
How is the energy distribution in the radiation spectrum of a black body characterized according to the text?
How is the energy distribution in the radiation spectrum of a black body characterized according to the text?
