Question 1

Which is the most likely evolution of a star which is 10 times more massive than out Sun?

  A  

main sequence star → red supergiant → white dwarf → black dwarf

  B  

main sequence star → supernova → red supergiant → neutron star

  C  

main sequence star → red supergiant → supernova → neutron star

  D  

main sequence star → red giant → neutron star → black hole

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Question 2

The parallax angle for a star is 0.015 seconds of arc. 

What is the distance in parsecs (pc) of the star from Earth?

  A  

67 pc

  B  

133 pc

  C  

220 pc

  D  

2.1 x 1018 pc

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Question 3

A spectral line corresponds to a wavelength λ1​in the laboratory. 

The same spectral line observed in the spectrum of a receding galaxy corresponds to a wavelength λ2​. 

The distance of the galaxy from the earth is d. The speed of light in a vacuum is c. 

What is the correct expression for the Hubble constant H0? 

  A  

H0​≈dλ1​c(λ2​−λ1​)​

  B  

H0​≈d(λ2​−λ1​)cλ1​​

  C  

H0​≈dλ1​cλ2​​

  D  

H0​≈dλ2​cλ1​​

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Question 4

Which of the following is the greatest astronomical distance?

  A  

1.0 pc

  B  

2.0 ly

  C  

3.4 x 105 Au

  D  

4.0 x 1013 km

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Question 5

A hot metal emits a black-body spectrum. The luminosity of the metal at 800 °C is L. 

What is the luminosity of the metal when at 1000 °C?

  A  

1.2L

  B  

1.3L

  C  

2.0L

  D  

2.4L

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Question 6

Some stars will evolve into white dwarfs. 

The mass of the sun is 2.0 x 1030 kg. 

Which of the following cannot be the mass of a white dwarf?

  A  

1.2 x 1030 kg

  B  

2.0 x 1030 kg

  C  

2.7 x 1030 kg

  D  

3.2 x 1030 kg

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Question 7

An astronomer analyses light from a distant galaxy. 

One of the spectral lines in the spectrum observed from the galaxy has wavelength 610 nm. 

The same spectral line has a wavelength of 590 nm when measured in the laboratory. 

What is the speed of this galaxy?

  A  

9.8 x 106 ms-1

  B  

1.0 x 107 ms-1

  C  

2.9 x 108 ms-1

  D  

3.0x 108 ms-1

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Question 8

Betelgeuse is a star in the constellation or Orion which astronomers think could undergo a supernova explosion. 

What could Betelgeuse evolve into following the supernova stage?

  A  

main sequence star

  B  

neutron star

  C  

planetary nebulae

  D  

red giant star

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Question 9

The intensity against wavelength graph of an object at 750°C peaks at a wavelength of λ. The temperature of the object is raised to 960°C. 

What is the wavelength now at the new peak intensity in terms of λ?

  A  

0.78λ

  B  

0.83λ

  C  

1.2λ

  D  

1.3λ

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Question 10

Which two quantities are related in Hubb;e's law?

  A  

distance and mass of galaxies.

  B  

velocity and intensity of galaxies.

  C  

distance and velocity of galaxies

  D  

distance and red shift of stars in our galaxy.

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