Energy transmitted through space as waves 

As wavelength increases; frequency _______________. 

Visible light is the only type of electromagnetic radiation that humans can see. 

The first telescope was built by 

________________ created the first REFLECTING telescope using mirrors. 

Refracting telescopes use mirrors.

Reflecting telescopes are more useful than refracting telescopes because 

Radio telescopes are better to use because it is out in space and is not blocked by Earth's atmosphere and does not get distorted by light pollution. 

These telescopes collect microwave radiation. 

The first space telescope was