#1
Which property of a celestial body determines its color?
Temperature
ExplanationTemperature determines the color of a celestial body.
#2
What does the term 'redshift' indicate in astronomy?
Increase in the wavelength of light emitted by a celestial body
ExplanationRedshift indicates an increase in the wavelength of light emitted by a celestial body.
#3
What does the term 'emission spectrum' refer to in astronomy?
A spectrum formed by the emission of specific wavelengths of light
ExplanationAn emission spectrum refers to a spectrum formed by the emission of specific wavelengths of light.
#4
What is the primary characteristic used to classify stars into different spectral types?
Temperature
ExplanationTemperature is the primary characteristic used to classify stars into different spectral types.
#5
What is the primary method astronomers use to measure the temperature of stars?
Stellar spectroscopy
ExplanationAstronomers use stellar spectroscopy as the primary method to measure the temperature of stars.
#6
What does the term 'spectral lines' refer to in astronomy?
Lines formed due to absorption or emission of specific wavelengths of light
ExplanationSpectral lines are formed by the absorption or emission of specific wavelengths of light.
#7
What is the primary factor affecting the width of spectral lines?
Temperature of the celestial body
ExplanationThe temperature of the celestial body primarily affects the width of spectral lines.
#8
Which of the following spectral types corresponds to the hottest stars?
Type O
ExplanationType O stars correspond to the hottest stars.
#9
Which type of celestial body emits the most intense radiation?
Black holes
ExplanationBlack holes emit the most intense radiation among celestial bodies.
#10
What characteristic of a celestial body's spectrum helps astronomers determine its radial velocity?
Shift of spectral lines
ExplanationThe shift of spectral lines helps astronomers determine a celestial body's radial velocity.
#11
Which celestial phenomenon is associated with the formation of absorption lines in a spectrum?
Absorption
ExplanationAbsorption is associated with the formation of absorption lines in a spectrum.
#12
What is the primary factor that determines the width of absorption lines in a celestial body's spectrum?
Pressure
ExplanationPressure is the primary factor determining the width of absorption lines in a celestial body's spectrum.
#13
What is the primary method astronomers use to determine the composition of celestial bodies?
Analyzing their spectra
ExplanationAstronomers determine the composition of celestial bodies by analyzing their spectra.
#14
What is the primary purpose of using spectroscopy in astronomy?
To determine the composition and properties of celestial bodies
ExplanationThe primary purpose of spectroscopy in astronomy is to determine the composition and properties of celestial bodies.
#15
Which type of celestial body emits a continuous spectrum?
Main sequence stars
ExplanationMain sequence stars emit a continuous spectrum.
#16
What is the primary factor determining the color of a main sequence star?
Temperature
ExplanationTemperature is the primary factor determining the color of a main sequence star.
#17
What is the primary reason astronomers observe celestial bodies across different wavelengths?
To understand their internal structure and composition
ExplanationAstronomers observe celestial bodies across different wavelengths to understand their internal structure and composition.