K.C.S.E Physics Q & A - MODEL 2019PP2QN16
(a) Define the following terms as used in waves:
(b) Figure 8 shows water waves approaching a straight reflector at a speed of 40 cm/s.
(I) Draw on the diagram the reflected waves.
(ii) Given that the distance between the source and the reflector is 15 cm determine:
I. the wavelength of the waves
II. the frequency of the waves
(c) Figure 9 Shows light rays from two coherent sources S1 and S2 falling on a screen.
Dark and bright fringes are observed between A and B
(i) State how:
I. bright fringes are formed
II. dark fringes are formed
(ii) State what is observed when light of a higher frequency is used.
(a)(i)Amplitude is the maximum displacement of a particle from the mean position
(ii)Wavelength is the distance between two successive points in a wave which are in phase
Distance between two successive crests or troughs in a transverse
Wave/between rarefaction or compressions in a longitudinal wave.
(c)(I) due to constructive interference
(II) due to destructive interference
(ii) The fringes get closer
When the frequency is higher the wavelength reduces hence the fringe separation decreases
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FORM I - PHYSICS SYLLABUS
FORM II - PHYSICS SYLLABUS
FORM III - PHYSICS SYLLABUS
FORM IV - PHYSICS SYLLABUS
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