Question

50 points!

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

Answer 1

velocity=v = 22.5 * 10⁷ m s ^ - 1

Step-by-step explanation:

`\sf\longmapsto \: Frequency = 6 * 10 ^ {14 } H z`

`\sf\longmapsto \: Wavelength = 3.75 * 10 {}^(-7) m`

Now let's solve out!!

`\sf\longmapsto \: velocity = frequency \lambda`

`\sf\longmapsto \: velocity=6 * 10 {}^(14) s {}^( - 1) * \ 3.75 * 10 {}^( - 7) m`

`\sf\longmapsto \: velocity= 22.5 * 10 ^ 7 m s ^ { - 1}`

Note:

`\lambda` is the Greek letter known as lambda.

Answer 2

`\\ \bull\sf Frequency=f=6* 10^(14)Hz`

`\\ \bull\sf Wavelength=\lambda=3.75* 10^(-7)m`

Now

• . Velocity=v

`\\ \sf\longmapsto v=f\lambda`

`\\ \sf\longmapsto v=6* 10^(14)s^(-1)* 3.75* 10^(-7)m`

`\\ \sf\longmapsto v=22.5* 10^7ms^(-1)`