00:01
Hello everyone we are going to understand this question here given in the question given what is frequency of light which has wavelength of air in wavelength of light in air wavelength of light in air that is represented by lambda which is which is 546 nanometer, 546 nanometer.
00:47
Or we can write 546 into 10 to the power minus 9 meter.
00:54
And we know that frequency, frequency of light frequency f is equal to c upon lambda.
01:16
So here speed of light, that is 3 into 10 to the power 8 upon wavelength.
01:21
That is 546 into 10 to the power minus 9 hertz.
01:28
After calculation we will get 0 .0055 into 10 to the power 17 hertz.
01:43
Now doing further calculation so we will get f is equal to frequency of light f is equal to 5 .5 into 10 to the power 14 hertz.
01:58
Now in second question we have to find what is its frequency in water? we know that frequency of light is a property of light means it's depending on the source.
02:13
We know that we know that frequency of light is depending on the source.
02:26
Frequency is depending on source.
02:33
Depending on source.
02:36
So frequency of light in water will not change.
02:42
So frequency of light frequency of light in water will also same, will also same, that is, will also same, that is 5 .5 into 10 to the power 14 hertz.
03:16
Now in third we have to find speed of light in white in here, refractive index of water is given.
03:29
Refractive index of water that is represented by mu which is 1 .33...