4
PHY-102: Wave, Sound, and Light
Exercises
Complete the following exercises.
1. What is the source of all waves?
Waves are begun from the vibrations of moving items, or it could be because of the
exchange of vitality. As a rule, hotspot for every one of the waves is the vibration
of moving items.
2. A water wave vibrates up and down four times each second, the distance between two
successive crests is 5 meters, and the height from the lowest part to the highest part of the
wave is 2 meters.
a. What is the frequency of the wave in hertz?
Frequency is characterized as the quantity of cycles every second. As referenced
in the given data that, wave vibrated 4 times each second, henceforth the
frequency of the wave will be 4Hz.
b. What is the period of the wave in seconds?
Timespan is the time taken by one wave to finish its cycle and is the equal of
frequency. Consequently, the timeframe of the wave will be ¼=0.25
seconds.
c. What is the speed of the wave in meters per seconds?
The connection between the speed, frequency and wavelength is given as pursues,
v= f λ Where f is the frequency of wave, which is 4Hz for this situation. The
wavelength of the wave is the separation between to back to back coverings or
troughs of wave, which is 5m for this situation. Subsequently the speed of wave
will be v= f λ =(4)(5)=20ms−1
d. What is the amplitude of the wave in meters?
Amplitude is the half of the tallness between the covering and trough of the wave, for
this situation the stature between the outside layer and trough is 2m, henceforth the
amplitude of the wave is 1m.
3. When you sit in the stands at a baseball stadium, you will hear the crack of the bat a short
time after you see the batter hit the ball. Explain. Siting in the stands at a baseball arena,
one hears bat hitting the ball a short-lived timeframe after he see the ball hitting the bat.
This occurs because of certainty about the distinction in speed of light and speed of sound
, 4
in a similar medium (air for this situation). As the speed of light is 300000 Km/sec and
the speed of sound in air is around 332 m/sec. So, the speed of light is a lot quicker than
PHY-102: Wave, Sound, and Light
Exercises
Complete the following exercises.
1. What is the source of all waves?
Waves are begun from the vibrations of moving items, or it could be because of the
exchange of vitality. As a rule, hotspot for every one of the waves is the vibration
of moving items.
2. A water wave vibrates up and down four times each second, the distance between two
successive crests is 5 meters, and the height from the lowest part to the highest part of the
wave is 2 meters.
a. What is the frequency of the wave in hertz?
Frequency is characterized as the quantity of cycles every second. As referenced
in the given data that, wave vibrated 4 times each second, henceforth the
frequency of the wave will be 4Hz.
b. What is the period of the wave in seconds?
Timespan is the time taken by one wave to finish its cycle and is the equal of
frequency. Consequently, the timeframe of the wave will be ¼=0.25
seconds.
c. What is the speed of the wave in meters per seconds?
The connection between the speed, frequency and wavelength is given as pursues,
v= f λ Where f is the frequency of wave, which is 4Hz for this situation. The
wavelength of the wave is the separation between to back to back coverings or
troughs of wave, which is 5m for this situation. Subsequently the speed of wave
will be v= f λ =(4)(5)=20ms−1
d. What is the amplitude of the wave in meters?
Amplitude is the half of the tallness between the covering and trough of the wave, for
this situation the stature between the outside layer and trough is 2m, henceforth the
amplitude of the wave is 1m.
3. When you sit in the stands at a baseball stadium, you will hear the crack of the bat a short
time after you see the batter hit the ball. Explain. Siting in the stands at a baseball arena,
one hears bat hitting the ball a short-lived timeframe after he see the ball hitting the bat.
This occurs because of certainty about the distinction in speed of light and speed of sound
, 4
in a similar medium (air for this situation). As the speed of light is 300000 Km/sec and
the speed of sound in air is around 332 m/sec. So, the speed of light is a lot quicker than
