00:02
So, the question is, a monochromatic light of wavelength 589 nanometer as incident from here on a water surface, what are the wavelength frequency and speed of the expected light? so, first of all, they have given us in the given the wavelength, so that is lambda is equal to 589 nanometers.
00:22
So we'll convert this into meters, that is 589 into 10 raise to 10 raise to minus 9 meters.
00:29
Next, the speed of light, that is c, we'll take it as 3 into 10 rise to 8 meters.
00:36
The refractive index of water, mu, is 1 .33.
00:41
And now we have to find the wavelength frequency and speed of reflected light.
00:47
So, the first is we need to find the wavelength of light.
00:52
So let's find it.
00:54
So for that, we know the formula, v is equal to c upon lambda...