Physics Annual Examinations For Secondary Schools Form 5 - Directorate For Quality And Standards In Education, 2014 Page 9
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1111. John, George and Paul were in the physics laboratory investigating some properties of light.
a) John aimed a light ray towards a rectangular glass block as shown in the diagram below.
i) What is angle ‘i’ called? ________________________________________________ [2]
ii) Complete the path of the light ray in the glass block.
[3]
i
iii) What happens to the speed of light when the ray enters the glass block?
_____________________________________________________________________[2]
b) Paul places a well-lit object O in front of a converging (convex) lens as shown below.
O
F
F
i) Measure the focal length of the lens._______________________________________ [2]
ii) Complete the ray diagram above to find where the image I of the object O forms.
[3]
iii) Underline the correct answer:
The setup in this diagram is used in a (projector, camera, magnifying glass)
[2]
c) Underline THREE of the words or phrases below which best describe the image.
Real
Virtual
Upright
Inverted
Magnified
Diminished
Same size
[3]
d)
i) The height of the object = ___________cm
[1]
ii) The height of the image = ___________cm
[1]
iii) Calculate the magnification = ____________________________________________ [1]
Physics – Secondary Schools - Track 2 – Form 5 – 2014
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