GCSE - Gcse Physics - Energy - Infrared Radiation Solution

Q.1.

When was infrared radiation discovered?

Q.2.

What is the wavelength band of infrared waves?

Q.3.

Does infrared radiation have a longer or shorter wavelength than visible light?

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Longer
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Shorter
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They are the same
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The wavelength of infrared radiation changes and can be both longer and shorter dependent upon certain factors

Q.4.

Which of the following emits the most infrared radiation?

Q.5.

Why do dark objects get hot in direct sunlight even though a lot of the sun's infrared radiation does not get through the atmosphere?

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Dark objects are good at absorbing all types of electromagnetic waves and will re-emit them as infrared radiation
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Dark objects do not get hot in direct sunlight
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They gradually absorb the sun's IR and eventually get hot
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They are predominately heated by the Earth and this effect is mistaken for being heated by UV rays

Q.6.

How fast does infrared radiation travel at?

Q.7.

What is infrared radiation?

Q.8.

How can we sense infrared radiation, even though we cannot see it?

Q.9.

What kinds of bodies emit infrared radiation?

Q.10.

Why is infrared radiation good for investigating areas of space where large gas clouds have formed?

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It is no better than other types of electromagnetic waves
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It has a longer wavelength than visible light which allows it to pass through these clouds
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It has a shorter wavelength than other types of radiation which allows it to pass through these clouds
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Infrared radiation is absorbed by gas clouds so we cannot detect infrared waves originating from behind the clouds