Physics WAEC Past Questions

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166

A ray of light strikes a plane mirror at an angle of incidence i. Determine in terms of i the angle of deviation of the ray after reflection from the mirror.

A. i
B. 2i
C. 90^o-i
D. 90^o+ i
E. 180^o - 2i

View Answer & Discuss (1) WAEC 1992

167

Images formed by a convex mirror are always

A. inverted, real and diminished
B. inverted, virtual and diminished
C. erect, virtual and diminished
D. erect, real and magnified
E. erect, virtual and magnified

View Answer & Discuss (2) WAEC 1992

168

Which of the following statements is not correct for a light ray passing through a rectangular glass block which is surrounded by air? It

A. suffers a displacement at the point of emergence
B. emerges parallel to the incident ray
C. is partly reflected at the point of incidence
D. is deviated at the point of emergence
E. is reflected in the block

View Answer & Discuss (5) WAEC 1992

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169

In an experiment to measure1 the focal length f of a converging lens object distances u and corresponding image distance were measured and 1/u plotted against 1/v to obtain the graph illustrated. How would f be determined from this graph?