The Electromagnetic Spectrum and the Doppler Effect
Pretend you are an editor for an astronomy magazine called Star Chaser. A new reporter needs help in writing an article about the electromagnetic spectrum and the Doppler effect. In order to help her with her article, read each of the statements below and then rewrite the sentence so that the bolded section contains correct information.
This activity is available below or in a printable version.
- The longest wavelengths are gamma waves. One wavelength can be hundreds of inches long.
- It is believed that infrared waves that exist throughout space are signals emitted by incredibly hot atoms shortly after the Big Bang.
- Visible radiation allows astronomers to learn about hot, excited regions of the universe like hot stars and areas of hot nebula.
- X-rays are generated in extremely hot places like in a star's core, when stars explode in a supernova, or from black holes.
- According to the Doppler effect, if the source of sound is stationary, the waves in front of the source are compressed and the waves in back of the source are further apart.
- If a star is moving towards Earth, then the perceived frequencies of the light waves are higher than expected and the wavelengths would be longer, or “redshifted.”
- Hubble's Law recognizes that there is a direct relationship between how far a galaxy is from Earth and how large the galaxy is.
- Hubble's Law is one of the first pieces of evidence supporting the Steady State Theory.
Once you have completed your fact checking activity, please submit your work to the dropbox.