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Physics Past Questions and Answers

Waec Physics Questions

Question 1361:

A ray of light travels from air to water. The refeactive index of water is given by the expression

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A \(\frac{\text{velocity in water}}{\text{velocity in air}}\)
B \(\frac{\text{sine of angle of refraction}}{\text{sine of angle of incidence}}\)
C \(\frac{\text{apparent depth}}{\text{real depth }}\)
D \(\frac{\text{wavelength in air}}{\text{wavelength in water}}\)

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Question 1362:

A lens that is thinner at the middle and thicher at the edges is

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A Diverging
B Converging
C Plano-convex
D Converging meniscus

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Question 1363:

Which of the following electromagnetic wave has the longest wavelength?

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A Radio-waves
B Gamma rays
C Infrared waves
D Ultraviolet rays

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Question 1364:

The amplitude of a sound wave determines its

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A Frequency
B Quality
C Loudness
D Pitch

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Question 1365:

As the air column of length L in an air pipe decreases, the frequency of the sationary wave emitted

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A Decreases
B Increases
C Varies as L²
D Varies as \(\sqrt{L}\)

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