Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key


Play button


Play button




Click to flip

8 Cards in this Set

  • Front
  • Back
electromagnetic energy?
-forms of energy
-(i.e- X rays and Radio waves)
-all travel at fast speeds
electromagnetic spectrum?
a range of wavelengths, from radio waves to gamma rays.
Radio Astronomy?
the study of radio waves from space
-are recieved from dark places in the sky that seem empty
to improve the radio images
the distance two radio telescopes. The reater the baseline the greater the accuracy
Radio telescope arrays
radio telescopes arranged in groups
-reasoning:because when a group of them works as one it produces a stronger image
Why are there no ultraviolet, X-ray, or gamma ray on earth's surface?
because mos infrared wavelengths are absorbed by the Earth's atmosphere
What does IRAS stand for?
-Infrared Astrononmy Satillite
-was used to detect unknown galaxies