Chapter 2 Flashcards
(11 cards)
Because of their higher frequency, X-rays must travel through space faster than radio waves.
False
If you had X-ray vision, then you could easily read an entire book without turning any pages or opening the book.
False
If a distant galaxy is observed to have a substantial redshift (as viewed from our Galaxy), then anyone living in that distant galaxy would see a substantial redshift in the spectrum seen when observing the Milky Way Galaxy.
True
Compared to red light, blue light has a higher frequency and…
Higher energy and shorter wavelength
Radio waves are a form of…
Light
The set of spectral lines that we see in a star’s spectrum PRIMARILY depends on the star’s…
Chemical Composition
The Sun’s light primarily peaks in the visible light portion of the electromagnetic spectrum. A star whose spectrum peaks in the infrared would be…
Cooler than our sun
A spectral line that appears at a wavelength of 321 nanometers (frequency of 93 kHz) in the laboratory, now appears at a wavelength of 328 nanometers (frequency of 91 kHz) in the spectrum observed of a distant object. We would say that the objects spectrum is therefore…
Red shifted
The Hubble Space Telescope obtains higher-resolution images than most ground-based telescopes primarily because it is…
Above the Earth’s atmosphere
The color of light we see when observing in space tells us about…
The temperature, the chemical makeup of the object, and how fast the object is moving toward or away from us
A star whose spectrum peaks in the infrared is…
Cooler than our sun
