Emission, continuum and absorption spectra.
Which is hotter a blue or a red star?
Blue is hotter.
Do humans emit electromagnetic radiation?
Yes, we emit infrared light.
Which planet looks red from Earth?
Mars.
Describe a refraction telescope
A refraction telescope works like a magnifying glass. Galileo used a refraction telescope to see Jupiter moons.
Describe a reflection telescope
A reflection telescope uses a concave mirror.
Why telescopes are sent to space?
Telescopes are sent into space to avoid the Earths atmosphere and light pollution.
Can we detect radio waves from space?
Yes, our sun emits radio waves which we can detect with radio telescopes.
Describe the Arecibo telescope in Puerto Rico
The Arecibo telescope is the worlds largest radio telescope, and is used in radar astronomy.
What is the Doppler effect?
An increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move toward (or away from) each other.
No comments:
Post a Comment