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Astronomy Olympiad Olympiad Astronomy — practice questions — page 4

Explore 120 free Olympiad Astronomy questions in Astronomy Olympiad Astronomy. Open each question or exercise to read its content, reference answers and available explanation.

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Olympiad Astronomy questions and exercises with answers

Showing questions 91–120 of 120.

The distance covered by one complete cycle of a wave is called its:Read the answer and worked solution →The number of wave cycles passing a point each second is the wave's:Read the answer and worked solution →One cycle per second is also given the unit name:Read the answer and worked solution →Wavelength and frequency are linked because all electromagnetic waves share the same:Read the answer and worked solution →Compared with short waves, waves with longer wavelengths have frequencies that are:Read the answer and worked solution →A packet of electromagnetic energy behaving like a particle is called a:Read the answer and worked solution →Among the colours of visible light, the photons with the highest energy are:Read the answer and worked solution →Compared with an X-ray, a radio wave carries energy that is:Read the answer and worked solution →As light travels farther from its source, its strength becomes:Read the answer and worked solution →The full range of electromagnetic radiation, from radio to gamma rays, is the:Read the answer and worked solution →High frequency waves from space must be observed from orbit because they are stopped by the:Read the answer and worked solution →Low frequency radio waves from space are blocked by Earth's:Read the answer and worked solution →As an object is heated, the motion of its atoms and molecules becomes:Read the answer and worked solution →The law stating that hotter bodies peak at shorter wavelengths is:Read the answer and worked solution →Two stars differ in colour. The blue one, compared with the red one, is:Read the answer and worked solution →Astronomers give stellar temperatures on which scale?Read the answer and worked solution →The Stefan law says the energy flux of a blackbody depends on temperature raised to the power:Read the answer and worked solution →White sunlight passed through a prism spreads into a rainbow band called a:Read the answer and worked solution →A thin cool gas in front of a hot source produces dark lines known as:Read the answer and worked solution →A hot thin gas seen with no bright source behind it shows bright:Read the answer and worked solution →A star moving away from us has its spectral lines shifted towards the:Read the answer and worked solution →The Doppler effect responds only to the part of a star's motion that is:Read the answer and worked solution →Catch the spectrum bandsRead the answer and worked solution →Pop the wave wordsRead the answer and worked solution →Run the light gatesRead the answer and worked solution →Slice the light termsRead the answer and worked solution →Toward or awayRead the answer and worked solution →Sort the spectraRead the answer and worked solution →Type the numberRead the answer and worked solution →Light and spectra bingoRead the answer and worked solution →

Worked practice questions

The distance covered by one complete cycle of a wave is called its:

  1. Wavelength
  2. Wavefront
  3. Waveguide
  4. Waveshape
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Correct answer: A. Wavelength

1. One full up and down cycle covers a fixed distance. 2. That distance separates successive crests. 3. It is the wavelength. _Source: OpenStax Astronomy 2e, Chapter 5, Radiation and Spectra._

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The number of wave cycles passing a point each second is the wave's:

  1. Fidelity
  2. Frequency
  3. Fluency
  4. Fluidity
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Correct answer: B. Frequency

1. Counting crests per second measures how fast cycles arrive. 2. That count has its own name. 3. It is the frequency. _Source: OpenStax Astronomy 2e, Chapter 5, Radiation and Spectra._

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One cycle per second is also given the unit name:

  1. Hertz
  2. Henry
  3. Hubble
  4. Hafnia
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Correct answer: A. Hertz

1. The unit honours the physicist who found radio waves. 2. His name became the unit. 3. That unit is the hertz. _Source: OpenStax Astronomy 2e, Chapter 5, Radiation and Spectra._

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