Black Body Radiation

What is black body radiation?

• Radiation emitted by a perfect reflector

• Radiation emitted by a perfect absorber

• Radiation emitted by a transparent body

• Radiation emitted by a coloured body

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Which of the following is a property of black body radiation?

• It depends on the material of the body

• It depends on the temperature of the body

• It depends on the shape of the body

• It depends on the colour of the body

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When the temperature of black body radiation is decrease, the maximum intensity of the radiation will be...

• Move to the longer wavelength

• Move to the higher frequency

• There is no change

• First it moves to the shorter wavelength and after that move back to the longer wavelength

• Depends on the condition

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A blackbody curve on a graph tells us how an object releases

• radio waves according to Planck's constant.

• light through a black hole's event horizon.

• radiation over different frequencies.

• heat over time.

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Blackbody curves also tell astronomers about the ___ of an object (like a star).

• rotational energy

• temperature

• distance

• composition

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What color would this object glow if it were heated to 5,000 K?

• Green

• Yellow

• Red

• Infrared

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Choose the correct statement of an ideal blackbody

• Emits 100% of the light it generates, but cannot absorb its own radiation

• Absorbs half of the light incident upon it and emits half of the radiation it generates

• Absorbs all light incident on it, or emits all of the radiation it generates

• Absorbs 100% of the light incident upon it, but cannot emit light of its own

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Which object has the highest temperature?

• A

• B

• C

• D

• F

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Identify the correct statement.

• The electromagnetic radiation emitted by a hot body depends on its temperature and what it is made of

• The electromagnetic radiation emitted by a hot body depends on its size and what it is made of

• The electromagnetic radiation emitted by a hot body depends on its colour and what it is made of

• The electromagnetic radiation emitted by a hot body depends only on its temperature

What is the primary characteristic of a black body in terms of radiation?

• It reflects all incident radiation

• It absorbs all incident radiation

• It transmits all incident radiation

• It refracts all incident radiation

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