LEARN MORE REMARKS The same equation can be used to find the frequency in each case, despite the great difference between the physical phenomena. Notice how much larger frequencies of light waves are than frequencies of sound waves. QUESTION A wave in one medium encounters a new medium and enters it. Which of the following wave properties will be affected in this process? (Select all that apply.) wavelength Ofrequency speed PRACTICE IT Use the worked example above to help you solve this problem. A wave has a wavelength of 2.75 m. Calculate the frequency of the wave if it is each of the following types of waves. Take the speed of sound as 343 m/s and the speed of light as 3.00 x 108 m/s. (a) a sound wave Hz (b) a light wave Hz EXERCISE HINTS: GETTING STARTED I I'M STUCK! (a) Find the wavelength of an electromagnetic wave with frequency 9.5 GHz = 9.50 x 10⁹ Hz (G = giga = 10%), which is in the microwave range. λ = m (b) Find the speed of a sound wave in an unknown fluid medium if a frequency of 557 Hz has a wavelength of 2.75 m. m/s y =

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LEARN MORE
REMARKS The same equation can be used to find the frequency in each case, despite the great
difference between the physical phenomena. Notice how much larger frequencies of light waves are than
frequencies of sound waves.
QUESTION A wave in one medium encounters a new medium and enters it. Which of the following
wave properties will be affected in this process? (Select all that apply.)
wavelength
frequency
speed
PRACTICE IT
Use the worked example above to help you solve this problem. A wave has a wavelength of 2.75 m.
Calculate the frequency of the wave if it is each of the following types of waves. Take the speed of sound
as 343 m/s and the speed of light as 3.00 x 108 m/s.
(a) a sound wave
Hz
(b) a light wave
Hz
EXERCISE
HINTS: GETTING STARTED | I'M STUCK!
(a) Find the wavelength of an electromagnetic wave with frequency 9.5 GHz = 9.50 × 10⁹ Hz
(G = giga = 10%), which is in the microwave range.
λ =
m
(b) Find the speed of a sound wave in an unknown fluid medium if a frequency of 557 Hz has a
wavelength of 2.75 m.
m/s
V =
Transcribed Image Text:LEARN MORE REMARKS The same equation can be used to find the frequency in each case, despite the great difference between the physical phenomena. Notice how much larger frequencies of light waves are than frequencies of sound waves. QUESTION A wave in one medium encounters a new medium and enters it. Which of the following wave properties will be affected in this process? (Select all that apply.) wavelength frequency speed PRACTICE IT Use the worked example above to help you solve this problem. A wave has a wavelength of 2.75 m. Calculate the frequency of the wave if it is each of the following types of waves. Take the speed of sound as 343 m/s and the speed of light as 3.00 x 108 m/s. (a) a sound wave Hz (b) a light wave Hz EXERCISE HINTS: GETTING STARTED | I'M STUCK! (a) Find the wavelength of an electromagnetic wave with frequency 9.5 GHz = 9.50 × 10⁹ Hz (G = giga = 10%), which is in the microwave range. λ = m (b) Find the speed of a sound wave in an unknown fluid medium if a frequency of 557 Hz has a wavelength of 2.75 m. m/s V =
SOLUTION
(A) Find the frequency of a sound wave with λ = 3.00 m.
Solve the equation for the frequency
(1)
and substitute.
f
f
с
=
V
(B) Find the frequency of a light wave with λ = 3.00 m.
Substitute into Equation (1), using the
speed of light for c.
2
343 m/s
3.00 m
3.00 x 108 m/s
3.00 m
114 Hz
1.00 × 108 Hz
Transcribed Image Text:SOLUTION (A) Find the frequency of a sound wave with λ = 3.00 m. Solve the equation for the frequency (1) and substitute. f f с = V (B) Find the frequency of a light wave with λ = 3.00 m. Substitute into Equation (1), using the speed of light for c. 2 343 m/s 3.00 m 3.00 x 108 m/s 3.00 m 114 Hz 1.00 × 108 Hz
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