Physics Sec Sample Paper Ii A Worksheet - University Of Malta, 2012 Page 5
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11(iii)
Using this ‘fibre optic solar lighting’ system, will it be possible to
channel the solar light to all the rooms of the building? Give one
reason for your answer.
_____________________________________________________________________
_____________________________________________________________________
(2)
(iv)
Name one major advantage of using this system to light up a building.
_____________________________________________________________________
(1)
(v)
Light rays lose part of their energy as they travel through fibre optics.
Give one possible reason for this loss of energy.
_____________________________________________________________________
(1)
(vi)
Give one advantage of using fibre optics instead of electrical wires for
telecommunications and networking.
_____________________________________________________________________
(1)
(c)
A group of students in a school science laboratory investigate how white light
travels through an equilateral glass prism as shown in Diagram 5.
Diagram 5
Screen
Ray of white light
Glass prism
(i)
Complete the ray diagram to show the emergent rays.
(2)
(ii)
On Diagram 5 above, label the two extreme colours observed on the
screen.
(1)
(iii)
Name the observed phenomenon of light.
_____________________________________________________________________
(1)
(iv)
Give one reason for what is observed on the screen.
_____________________________________________________________________
(1)
(v)
Suggest how a rainbow forms in the sky.
_____________________________________________________________________
_____________________________________________________________________
(2)
Page 5 of 11
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