Physics 2011 WAEC Past Questions

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Total internal reflection occurs in an optical prism when light rays

A. travel from the prism into an optically denser medium
B. are incident in the prism at an angle greater than the critical angle
C. are incident normally in the prism
D. travel from the prism to the air

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The speed of light in a certain medium is V while its speed in a vacuum is C. The absolute refractive index of the medium is

A. C + V
B. \(\frac{C}{V}\)
C. \(\frac{V}{C}\)
D. C - V

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An object is placed 20.0cm in front of a converging lens of focal length 15.0cm. Calculate its image distance

A. 1.3cm
B. 8.6cm
C. 35.0cm
D. 60.0cm

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Presbyopia is a defect of the eye resulting from

A. weak ciliary muscles
B. short eyeball
C. loss of sphericity of the lens
D. long eyeball

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The focal length of the eye-piece of an astronomical telescope is f₁, while the focal length of the object is f₂. Fro normal adjustment, the angular magnification is given by

A. \(\frac{f_2}{f_1}\)
B. 1 - \(\frac{f_2}{f_1}\)
C. \(\frac{f_2}{f_1}\) - 1
D. \(\frac{f_1}{f_2}\)

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Physics 2011 WAEC Past Questions

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