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**1. Homework Statement**

PART A) What is the frequency of blue light that has a wavelength of 450 nm?

PART B) What is the frequency of red light that has a wavelength of 650 nm?

PART C) What is the index of refraction of a material in which the red-light wavelength is 450 nm?

**2. Homework Equations**

[tex]v = f \lambda[/tex]

**3. The Attempt at a Solution**

__PART A__

[tex]f = \frac{v}{\lambda} = \frac{3*10^8}{450*10^{-9}} = 4.62*10^{14} Hz[/tex]

*CORRECT*

__PART B__

[tex]f = \frac{v}{\lambda} = \frac{3*10^8}{650*10^{-9}} = 6.67*10^{14} Hz[/tex]

*CORRECT*

__PART C__

Not sure. Can someone point me in the right direction?