00:01
Hello, in the question we need to find the wavelength of the electromagnetic wave with frequency of 9 gigahertz.
00:07
So let's say this f is given.
00:09
That is frequency is 9 gigahertz.
00:12
So that will turn out to be.
00:15
This will turn out to be 9 into 10 to the power 9 hertz.
00:20
So this is the frequency which is given in the question.
00:24
Which lies in the microwave region.
00:26
It is also mentioned in the question.
00:27
So we need to find out the wavelength.
00:33
So wavelength is c by where f is the frequency.
00:39
C is the speed of light which is 3 into 10 to the power 8 into 9 into 9 into 10 to the power 9.
00:46
So lambda will turn out to be 0 .33 into 10 raise to minus 1 meters or we can also write it as 0 .033 meters.
00:59
So this is the value of lambda...