ASTR 101-3, FALL 2010 1
LECTURE 5, SEPTEMBER 7, 2010
ASTR 101, SECTION 3INSTRUCTOR, JACK BRANDT
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a) wavelengthb) frequencyc) periodd) amplitudee) energy
The distance between successive wave crests defines the ________ of a wave.
Question 2
a) wavelengthb) frequencyc) periodd) amplitudee) energy
The distance between successive wave crests defines the ________ of a wave.
Question 2
Light can range from short-wavelength
gamma rays to long-wavelength radio
waves.
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a) gamma raysb) infraredc) soundd) visible lighte) radio
Which of these is NOT a form of electromagnetic radiation?
Question 1
a) gamma raysb) infraredc) soundd) visible lighte) radio
Which of these is NOT a form of electromagnetic radiation?
Question 1
Sound comes from pressure waves; all
others are types of EM radiation of different
wavelengths.
Question 8
What types of electro-magnetic radiation from space reach the surface of Earth?
a) radio & microwaves b) X rays & ultraviolet light c) infrared & gamma raysd) visible light & radio wavese) visible & ultraviolet light
Question 8
What types of electro-magnetic radiation from space reach the surface of Earth?
a) radio & microwaves b) X rays & ultraviolet light c) infrared & gamma raysd) visible light & radio wavese) visible & ultraviolet light
Earth’s atmosphere allows radio waves and visible light to reach the
ground.
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a) radius.b) mass.c) magnetic field.d) temperature.e) direction of motion.
The frequency at which a star’s intensity is greatest depends directly on its
Question 3
a) radius.b) mass.c) magnetic field.d) temperature.e) direction of motion.
The frequency at which a star’s intensity is greatest depends directly on its
Question 3
Wien’s Law means that hotter stars produce much more high- frequency light.
Question 4
a) cooler than b) the same temperature as c) older than d) hotter than e) more massive than
The constellation ORION
Rigel appears as a bright bluish star, whereas Betelgeuse appears as a bright reddish star.
Rigel is ______ Betelgeuse.
Betelgeuse
Rigel
Question 4
Rigel appears as a bright bluish star, whereas Betelgeuse appears as a bright reddish star.
Rigel is ______ Betelgeuse.
The constellation ORION
Betelgeuse
Rigel
a) cooler than b) the same temperature as c) older than d) hotter than e) more massive than
Hotter stars look bluer in color; cooler stars look redder.