I'm reading an e-book of chemistry. I found this expression: ϵ(photons)= h*c/λ. Now, I know h (6,626∗10^−34 J*s), c (3*10^8 m/s) and λ( 6,7*10^-7). The result is 4,4*10^-19. Why is the result this?

Question

I'm reading an e-book of chemistry.  I found this expression: ϵ(photons)= h*c/λ. Now, I know h (6,626∗10^−34 J*s), c (3*10^8 m/s) and λ( 6,7*10^-7). The result is 4,4*10^-19. Why is the result this?

aaronq · Answer

i got $2.9668*10^{-19}$

anonymous · Answer

lol. I'd like to know why the result is x*10^-19. How do you get 10^-19?

aaronq · Answer

like the physical interpretation or the numerical/mathematical reason, as in working with exponents?

anonymous · Answer

physical interpretation