Which of these is NOT a form of electromagnetic radiation?c Sound Explanation: Sound comes from pressure waves; all others are types of electro-magnetic radiation of different wavelength
Trang 1TO THE UNIVERSE
EIGHTH EDITION
CHAPTER 2
Light and Matter
Clickers
Trang 2Which of these is NOT a form of electromagnetic radiation?
Trang 3Which of these is NOT a form of electromagnetic radiation?
c) Sound
Explanation: Sound comes
from pressure waves; all
others are types of
electro-magnetic radiation of different wavelengths
Trang 4The distance between successive wave crests defines the _ of a wave.
Trang 5The distance between successive wave crests defines the _ of a wave.
a) wavelength
Explanation: Light can range from short-wavelength gamma rays to long-wavelength radio waves.
Trang 6The frequency at which a star’s intensity is greatest depends directly on its
Trang 7The frequency at which a star’s intensity is greatest depends directly on its
d) temperature.
Explanation: Wien’s law means that
hotter stars produce much more
high-frequency light
Trang 8Rigel appears as a bright bluish star, whereas Betelgeuse appears as a bright reddish star.
Rigel is _ Betelgeuse.
The constellation ORION
Betelgeuse
Rigel
Trang 9Rigel appears as a bright bluish star, whereas Betelgeuse appears as a bright reddish star.
Rigel is _ Betelgeuse.
d) hotter than
Explanation: Hotter stars look
bluer in color; cooler stars look redder
The constellation ORION
Betelgeuse
Rigel
Trang 10If a light source is approaching you, you will observe that
Trang 11If a light source is approaching you, you will observe that
c) its spectral lines are shorter in wavelength.
Trang 12The wavelengths of emission lines produced by an element
Trang 13The wavelengths of emission lines produced by an element
b) are identical to its absorption lines
Explanation: Elements
absorb or emit the same
wavelengths of light
based on their electron
energy levels
Trang 14Analyzing a star’s spectral lines can tell us about all of these EXCEPT its
Trang 15Analyzing a star’s spectral lines can tell us about all of these EXCEPT its
c) transverse
(side-to-side) motion.
Explanation: Only motion toward or away from us influences a star’s spectral lines Spectra can also tell us about a
star’s magnetic field
Trang 16What types of electromagnetic radiation from space reach the surface of Earth?
Trang 17What types of electromagnetic radiation from space reach the surface of Earth?
d) visible light and radio waves
Explanation: Earth’s
atmosphere allows
radio waves and visible
light to reach the ground
Trang 18Which of the following has a fundamentally different nature than the other four?
Trang 19Which of the following has a fundamentally different nature than the other four?
e) Photon
Explanation: Photons are packages
of light energy Protons, neutrons, and
electrons are particles of matter within an atomic nucleus