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Properties and Spectral Characteristics of Celestial Bodies Quiz

#1

Which property of a celestial body determines its color?

Temperature
Explanation

Temperature 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
Explanation

Redshift 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
Explanation

An 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
Explanation

Temperature 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
Explanation

Astronomers 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
Explanation

Spectral 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
Explanation

The 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
Explanation

Type O stars correspond to the hottest stars.

#9

Which type of celestial body emits the most intense radiation?

Black holes
Explanation

Black 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
Explanation

The 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
Explanation

Absorption 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
Explanation

Pressure 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
Explanation

Astronomers 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
Explanation

The 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
Explanation

Main sequence stars emit a continuous spectrum.

#16

What is the primary factor determining the color of a main sequence star?

Temperature
Explanation

Temperature 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
Explanation

Astronomers observe celestial bodies across different wavelengths to understand their internal structure and composition.

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