Solving a Problem with 2.55 eV/4.14 x 10^-15 eVs

[domyy]

Homework Statement

My book has a problem with a solution in which:

2.55 eV/4.14 x 10^-15 eVs = 6.16 x 10^ 14 Hz.

My question is:

I am trying to figure out why the answer is 10^14 when before they had 10^-15??

 

[gneill]

Homework Statement

My book has a problem with a solution in which:

2.55 eV/4.14 x 10 to the power of -15 eVs = 6.16 x 10 the power of 14 Hz.

My question is:

I am trying to figure out why the answer is 10 to the power of 14 when before they had 10 to the power of -15??

What's 2.55/4.14? Express it in scientific notation.

 

[domyy]

2.55/4.14 = 0.616 approximately.
Then I say 6.16 x 10^-1

 

[domyy]

10^-1 x 10^-15 = 10^-16 not 10^14 as my book says.

 

[gneill]

2.55/4.14 = 0.616 approximately.
Then I say 6.16 x 10^-1

Correct.

10^-1 x 10^-15 = 10^-16 not 10^14 as my book says.

But the 10^-15 is in the denominator. What happens to it when you 'promote' it to the numerator?

 

[domyy]

:rofl:ooooooooooooohhh I got it.
Thank you!