Find the speed of light in silica

[stickyriceyum]

Homework Statement

Light of wavelength 559nm in vacuum passes through a piece of silica (index of refraction 1.437). Find the speed of light in silica. Answer in units of m/s

Homework Equations

Index of Refraction = Speed of Light in Vacuum/Speed of Light in Substance
[n = c/v]

The Attempt at a Solution

Manipulate: [n = c/v] ---> [cn = v]
Plug in: (5.59 * 10^-7) (1.437) = (8.03 * 10^-7)

I converted 559nm to (5.59 * 10^-7) meters

It seems like a simple enough problem, but my answer is incorrect! =(

 

[tiny-tim]

Hi stickyriceyum!

Manipulate: [n = c/v] ---> [cn = v]
Plug in: (5.59 * 10^-7) (1.437) = (8.03 * 10^-7)

erm … try using c

 

[stickyriceyum]

I got it =D Thank you!