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NCERT Exemplar Solutions Class 9 Science Solutions for Sound - Exercise in Chapter 12 - Sound
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The given graph (Fig.12.2) shows the displacement versus time relation for a disturbance traveling with a velocity of 1500 m sā1. Calculate the wavelength of the disturbance.
Answer:
T= 2Ć106 s
Frequency v=1/š = 105hz
Wavelength Ī»š£/š =5Ć105m
Video transcript
"hello everyone welcome to leader
learning
i am good preet your science tutor
today's question is
the given graph figure 1 12.2
shows the displacement versus time
relation
for a disturbance traveling with a
velocity of
1500 meter per second
calculate the wavelength of the
disturbance so in this question from the
given graph we are going to calculate
the wavelength of the disturbance so
lets start our answer
if you observe this graph
from the graph we can see this one cycle
is completed at 2 microseconds
so the time period here will be 2
micro seconds and if you write it in
seconds
then it will be 2 into 10 to the power
minus 6 seconds
okay and velocity
is already given that is 1500
meter per second now what we have to
calculate is
wavelength wavelength that is lambda
can be calculated by the formula v into
t where v is already given that is 1500
into time period that is 2 into
10 to the power minus 6
so from here we'll get the value of
lambda as 3 into 10 to the power
minus 3 meters
so this will be the wavelength of the
disturbance for more such videos please
subscribe leader learning
and for any doubts drop a comment thank
you"
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