How can you use the em spectrum to explore the universe?

Answer 1

The HST uses EM waves to find things through echolocation or firing a beam of EM waves (or sound) at objects and seeing what a planet or star has done to change the light. Ultrasound works this way.

Answer 2

We depend heavily upon the electromagnetic spectrum to observe our environment, whether close or distant. Visible light is part of that spectrum, and vision is the most informative sense. Other parts of the spectrum which are not visible, such as infrared rays, microwaves, radio waves, X rays etc., can be observed by means of specialized equipment. All of these parts of the spectrum carry useful information. There are many astronomical objects which cannot be seen in the visible spectrum, or can be seen very poorly in the visible spectrum, but which can be seen very clearly in other parts of the electromagnetic spectrum.

Answer 3

-- use visible light to read things and learn stuff; knowledge is power.

-- use infrared radiation to stay warm;

-- use X-rays to figure out what's wrong when something hurts;

-- use radio and TV waves for entertainment;

-- use 2.5 GHz RF to cook food fast;

-- use 1.5 GHz RF to run my GPS;

-- use microwaves at 6 GHz and up to make my living;

Answer 4

The residual radio waves created at the time of the 'big bang' can still be detected (as background 'noise') in the radio part of the EM spectrum.