Question

Hello all, can you please answer this? I am struggling with this. I need this by tommorow. Question is below:

Light waves of frequency 6 x 10^14 Hz have a wavlength of 3.75 x 10^-7 m in water. What is their speed in water?

Answer 1

`c_(water) = 2.25* 10^(8)m/s`

Step-by-step explanation:

The speed of light in any medium is given by

`c = \lambda \\u`

where
`\lambda` is the wavelength and
`\\u` is the frequency. In water,

`c_(water) = \lambda_(water) \\u`

`\:\:\:\:\:\:\:\:= (3.75* 10^(-7)\:m)(6* 10^(14))\:Hz`

`\:\:\:\:\:\:\:\:= 2.25* 10^(8)\:m/s`