wave frequency

what is wave frequency

The number of waves that pass a fixed point in a given amount of time is wave frequency. Wave frequency can be measured by counting the number of crests (high points) of waves that pass the fixed point in 1 second or some other time period. The higher the number is, the greater the frequency of the waves. The SI unit for wave frequency is the hertz (Hz), where 1 hertz equals 1 wave passing a fixed point in 1 second. The Figure 1.1 shows high-frequency and low-frequency transverse waves. Q: The wavelength of a wave is the distance between corresponding points on adjacent waves. For example, it is the distance between two adjacent crests in the transverse waves in the diagram. Infer how wave frequency is related to wavelength.

textbook_image

wave frequency and energy

The frequency of a wave is the same as the frequency of the vibrations that caused the wave. For example, to generate a higher-frequency wave in a rope, you must move the rope up and down more quickly. This takes more energy, so a higher-frequency wave has more energy than a lower-frequency wave with the same amplitude. You can see examples of different frequencies in the Figure 1.2 (Amplitude is the distance that particles of the medium move when the energy of a wave passes through them.)

textbook_image

instructional diagrams

No diagram descriptions associated with this lesson

questions

a wave with a higher frequency has a longer wavelength.

a. true

-->  b. false

the frequency of a wave is the same as the frequency of vibrations that caused the wave.

-->  a. true

b. false

for waves of the same amplitude, a higher frequency wave has less energy than a shorter frequency wave.

a. true

-->  b. false

if 20 waves pass a fixed point in 10 seconds, the frequency of the waves is

a) 200 hz.

b) 100 hz.

c) 20 hz.

-->  d) 2 hz.

the frequency of four different waves is listed below. which wave has the most energy?

-->  a) 2000 hz.

b) 1000 hz.

c) 200 hz.

d) 20 hz.

diagram questions

No diagram questions associated with this lesson