BS Physics Fundamentals 2

Question 1

Which property of a sound wave determines the pitch perceived by a listener?

Accepted Answer

Frequency

Answer

Frequency determines pitch — a higher frequency produces a higher perceived pitch.

Question 2

The Doppler effect describes the change in observed wave frequency due to:

Accepted Answer

Relative motion between the source and the observer

Answer

The Doppler effect occurs when relative motion between the source and observer causes the observed frequency to differ from the emitted frequency.

Question 3

When light travels from air into glass, according to Snell's law it:

Accepted Answer

Slows down and bends toward the normal

Answer

Entering a denser medium like glass, light slows down and bends toward the normal because the index of refraction of glass is greater than that of air.

Question 4

Constructive interference between two waves occurs when:

Accepted Answer

Crests align with crests and troughs align with troughs

Answer

Constructive interference results from waves that are in phase — crest meets crest and trough meets trough — producing a combined wave of greater amplitude.

Question 5

The approximate speed of sound in air at room temperature is:

Accepted Answer

340 m/s

Answer

Sound travels at approximately 340 m/s in air at 20°C, far slower than the speed of light.

BS - Bachelor of Science Practice Test

BS - Bachelor of Science Practice Test

BS Physics Fundamentals 2