Vocabulary #5(The Tools of Astronomers)

1. universe: everything that exists.

2. telescope: a device that collects light and makes distant objects to seem closer and larger.

3. refraction: the bending of waves as they go from one substance to another.

4. reflection: the bending of waves off an object.

5. wavelenght: the distance from one peack to the next on a wave.

6. frequency: the number of waves that pass trough a point in seconds.

7. electromagnetic spectrum: waves of light in order by wavelenght.