BS Physics Fundamentals 2

Question 1

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

Accepted Answer

Frequency

Answer

Amplitude

Answer

Wavelength

Answer

Wave speed

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

Light bending as it enters a new medium

Answer

Destructive interference between two waves

Answer

Sound reflecting off a hard surface

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

Speeds up and bends away from the normal

Answer

Maintains its speed and direction unchanged

Answer

Slows down and bends away from the normal

Question 4

Constructive interference between two waves occurs when:

Accepted Answer

Crests align with crests and troughs align with troughs

Answer

Crests align with troughs

Answer

The waves have different frequencies

Answer

One wave has zero amplitude

Question 5

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

Accepted Answer

340 m/s

Answer

3 × 10⁸ m/s

Answer

1,500 m/s

Answer

100 m/s

Question 6

Which type of electromagnetic radiation carries the highest energy per photon?

Accepted Answer

Gamma rays

Answer

Radio waves

Answer

Visible light

Answer

X-rays

Question 7

Einstein's explanation of the photoelectric effect demonstrated that light:

Accepted Answer

Has particle-like properties carried in discrete photons

Answer

Always behaves purely as a wave

Answer

Can be polarized

Answer

Travels at different speeds in a vacuum depending on color