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Physics Paper 2, May/June. 2010  
Questions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Main
General Comments
Weakness/Remedies
Strength
Question 13

(a) State two factors which affect the angle of deviation of a ray of light through a triangular glass prism.
(b)Seven virtual images of an object are formed when two plane mirrors are inclined at an angle 0 to each other. Calculate the value of 0
(c)By means of a ripple tank, a student was able to generate series of transverse waves by varying the frequency ofthe dipper and all the waves so generated covered a distance of 0.80 m in 0.2 s.
(i)Determine the speed, v, of the waves
(ii)Copy and complete the table given above in your answer booklet.
(iii)Plot a graph with f on the vertical axis and h -1 on the horizontal axis.
(iv)What does the slope of the graph represent?

f(Hz)

λ/m

λ -1 /m -1

2.0

 

 

4.0

 

 

6.0

 

 

8.0

 

 

10.0

 

 

 

Observation

All the three parts (a), (b) and (c) were commendable responded to by candidates. However, few candidates could not give the correct interpretation of the slope of the graph.
The expected answers is:
The slope represents speed of the wave.


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