Physics Sec Sample Paper Ii A Worksheet - University Of Malta, 2012 Page 11
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11(c)
It was not until the twentieth century that astronomers realized that there were
galaxies in the Universe.
(i)
Suggest why.
_____________________________________________________________________
(1)
(ii)
Radio telescopes and optical telescopes may be used to observe the
sky. Explain.
_____________________________________________________________________
_____________________________________________________________________
(2)
(iii)
Name one possible advantage of having a telescope installed on a
satellite in orbit around the earth, such as Hubble Space telescope.
_____________________________________________________________________
(1)
(d)
On a crisp and cloudless night, Sarah and Toyah together with a member of an
astronomy society set up a telescope in a place far away from street lights.
(i)
The astronomy enthusiast claims that the image of Jupiter observed by
the students has left Jupiter about 30 minutes ago. Explain.
_____________________________________________________________________
_____________________________________________________________________
(2)
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(ii)
The Ursa Major galaxy is 1 x 10
light years away from us. If light
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travels with a speed of 3 x 10
m/s, calculate the distance of the galaxy
from Earth. Give your answer in standard form.
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
(3)
Page 11 of 11
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