Absorption of Radiant Energy by Different Colors- equation 5

[deleted-333382]

Can anyone help this math challenged mama figure out how, in converting joules to eV, the exponent came out to positive 22?

[norman40]

Hi Susie50,

I’m assuming that you’re working on the project described here:

https://www.sciencebuddies.org/science- ... ml#summary

Equation 5 is a conversion from energy to the rate of photon emission. The large exponent in the final result (22) comes from division by numbers with very small exponents. Take a look at the second term on the left hand side of the equation. This division of 1 by 1.6E-19 gives 6.25E18. The division in third term (1/0.000124) gives 8.06E3. Multiplication of these two results gives 5.04E22.

I hope this helps. Please ask again if you have more questions.

A. Norman