K.C.S.E Physics Q & A - MODEL 2013PP2QN018
(a) Figure 11 shows plane light waves in air incident on a convex lens whose principal focus is F, the waves move past point G.
Complete the diagram to show the pattern of the emergent waves between the lens and point G.
(b)Figure 12 shows crests of circular water waves spreading from two points A and B due to a vibrator. C and D are points on the surface of the water.
Given that the amplitude of each wave is 5 cm, state with a reason the amplitudes of the waves at point:
(c) Figure 13 shows a standing wave formed when a string of length 1 .5 m stretched between two supports is plucked in the middle.
(î) Explain how the standing wave is formed.
(ii) Determine the wavelength of the standing wave.
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FORM I - PHYSICS SYLLABUS
FORM II - PHYSICS SYLLABUS
FORM III - PHYSICS SYLLABUS
FORM IV - PHYSICS SYLLABUS
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