# Converting to nanometers

1. Nov 4, 2008

### jcvince17

1. The problem statement, all variables and given/known data

i just need to convert 2.8*1014 into nano meters

2. Relevant equations

$$\lambda$$ = v / f

3. The attempt at a solution

$$\lambda$$ = v / f

$$\lambda$$ = 2.0*108 / 700*10-9 (nanometers)

$$\lambda$$ = 2.8*1014

i am backwards on my conversion, i am horrible at it.

is it:

A - 2.80000000 nm

or

B - .00000028 nm

it wants my answer to three sig fig's

2. Nov 4, 2008

### mgb_phys

I'm guessing it's a frequency of 2.8^14 hz the OP wants to convert into a wavelegnth.

wavelength * frequency = speed.
so wavelength = c/f = 3e8 m/s / 2.8E14 /s = 1.07e-6m = 1070 e-9m

3. Nov 5, 2008

### jcvince17

yes that got the first problem correct.

thanks