Q.1
Why is infrared radiation good for investigating areas of space where large gas clouds have formed?
  • It is no better than other types of electromagnetic waves
  • It has a longer wavelength than visible light which allows it to pass through these clouds
  • It has a shorter wavelength than other types of radiation which allows it to pass through these clouds
  • Infrared radiation is absorbed by gas clouds so we cannot detect infrared waves originating from behind the clouds
Q.2
How fast does infrared radiation travel at?
  • 330 m/s
  • 3x108 m/s
  • Different types travel at different speeds
  • 30 mph
Q.3
What kinds of bodies emit infrared radiation?
  • All bodies above absolute zero
  • Cold bodies
  • All bodies
  • No bodies
Q.4
What is the wavelength band of infrared waves?
  • 750 nm - 1 mm
  • 1 mm - 100,000 km
  • 10 nm - 390 nm
  • Less than 0.01 nm
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?
  • Dark objects are good at absorbing all types of electromagnetic waves and will re-emit them as infrared radiation
  • Dark objects do not get hot in direct sunlight
  • They gradually absorb the sun's IR and eventually get hot
  • They are predominately heated by the Earth and this effect is mistaken for being heated by UV rays
Q.6
Does infrared radiation have a longer or shorter wavelength than visible light?
  • Longer
  • Shorter
  • They are the same
  • The wavelength of infrared radiation changes and can be both longer and shorter dependent upon certain factors
Q.7
When was infrared radiation discovered?
  • 2000
  • 1066
  • 1945
  • 1800
Q.8
Which of the following emits the most infrared radiation?
  • The Sun
  • An apple
  • A pear
  • A human being
Q.9
What is infrared radiation?
  • It's the transfer of energy by electromagnetic waves
  • The radiation given off by radioactive particles
  • Infrared radiation is a type of gas
  • It is the reaction that occurs by freezing water
Q.10
How can we sense infrared radiation, even though we cannot see it?
  • Taste it
  • Smell it
  • Feel it
  • Hear it
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