wave motion quiz

if the light speed is compared with the sound speed, which of these statements is

correct?

• The sound speed is faster than the light speed.
• The light speed and sound speed are equal.
• The light speed is slower than the sound speed.
• The light speed is faster than the sound speed.

the electric bell produces pulses of...................

• compressions and rarefactions.

• crests and troughs.

• crests and rarefactions.

• compressions and troughs.

Answer explanation

Tags

NGSS.MS-PS4-1

Scientists saw the explosions that occur on the Sun surface, but they couldn’t record

the sound of these explosions because the sound......................

• doesn’t travel from up to down.

• needs a medium to travel through.

• is mechanical waves that propagate in a definite direction.

• is electromagnetic waves that don’t propagate through free space.

Answer explanation

Sound waves are longitudinal waves because the particles of the medium......................

• don’t need a medium to propagate through.

• don’t vibrate.

• vibrate along the direction of wave propagation.

• vibrate in a direction perpendicular to the direction of wave propagation.

Answer explanation

All the electromagnetic waves have the same in vacuum.

• speed
• color
• temperature
• frequency

Tags

NGSS.HS-PS4-1

The distance between two successive crests or two successive troughs in the transverse

wave is.............

• Wavelength
• Velocity
• Amplitude
• Frequency

If the distance between the centre of the third compression and the centre of the

fifth compression on the wave propagation is 20 cm, then the wavelength of this wave........

• 10 CM

• 5 cm

• 20 cm

• 50 cm

Tags

NGSS.MS-PS4-1

1 millimeter equals all the following values, except

• 1 x I0⁶ nanometre.

• 1 x 10^-3 metre.

• b. 1 x 10 ³ micrometre.

• 1 x 10^-3 micrometre.

Answer explanation

...................is the maximum displacement of medium particles away from their rest positions.

• Frequency
• Amplitude
• Wavelength
• Velocity

Tags

NGSS.MS-PS4-1

.................. is the measuring unit of wave velocity.

• m/s
• ft/min
• cm/s
• km/h