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21 terms

Astronomy

Electromagnetic Spectrum, Chpt 3 (J)
STUDY
PLAY
radio waves
Of all the forms of electromagnetic radiation, the one with the lowest frequency is
True
Radio waves, visible light, and x-rays are all a type of electromagnetic radiation
visible
Which type of radiation can be observed well from Earth's surface?
velocity
Which of these is constant for ALL types of electromagnetic radiation in a vacuum?
frequency times the wavelength of the wave
A wave's velocity is the product of the
x-rays don't reach the surface of Earth
X-ray telescopes are located in orbit around the Earth because
ultraviolet
Which form of electromagnetic radiation would be blocked in the stratosphere by ozone?
True
An observer will measure the wavelength of waves eminating from a source that is moving away as longer than it really is.
Electromagnetic radiation
Can behave both as a wave and as a particle.
radial motion
The Doppler Effect is a phenomenon that allows one to measure an object's
bluer than it is
If a light source is approaching you at a speed very close to the speed of light, it will appear
no shift
The light from an object moving tangentially (to your left or right) will exhibit
Its energy peaks at the wavelength determined by its temperature
What is true of a blackbody?
Stefan's Law
If the Sun's temperature were doubled, it would give off 16x's more energy.
Star B must be bigger
Star A and Star B have the same temperature, but star B is more luminous than star A. What can you infer about these two stars?
True
As they move thru space, the vibrating electrical and magnetic fields of a light wave must move perpendicular to each other.
the frequency in Hertz
The number of waves passing the observer per second is
the wave nature of light
What does the phenomenon of interference demonstrate?
violet
The visible color of electromagnetic radiation that has the shortest wavelength is
transfer energy
Both sound waves and electromagnetic radiation
False
Observations in the x-ray portion of the spectrum are routinely done from the surface of the earth.