K.C.S.E Physics Q & A - MODEL 2000PP1QN27
​In fig 16.(a) the Polaroids ABCD and EFGH are oriented such that maximum light reaches the screen S. Sketch at X on Fig. 16 (b) the orientation of EFGH such that no light reaches S.
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K.C.S.E Physics Q & A - MODEL 1998PP2QN05
a) A ray of white light is incident on one face of a rectangular glass prism.
i) Draw a ray diagram to illustrate the dispersion of white light by the prism, showing only the red ® and violet (V) rays. ii) On the same diagram drawn in (i) mark and label the initial angle of incidence, 1, and the angles of reflection on the first face for red rR and for violet rV. iii) Snell's law for the red and colours can be written as nr= Sin I/Sin rR 
b) Calculate the critical angle for a material whose refractive index is 1.40.
ANSWERS
K.C.S.E Physics Q & A - MODEL 1998PP1QN27
During total eclipse of the sun, both light and heat are observed to disappear simultaneously. Explain the observation.
ANSWER
K.C.S.E Physics Q & A - MODEL 1995PP1QN25
Name the property of light that shows that it is a transverse wave
K.N.E.C MARKING SCHEME
A ray of light incident on the surface of a glass prism is observed to behave as represented in the diagram in figure 6 Explain this observation ( 3 mks)KNEC ANSWERS
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