Enter the wavelength (um) and the numerical aperture into the Calculator. The calculator will evaluate the Resolving Power.

## Resolving Power Formula

e = .61 * L/NA

Variables:

- e is the Resolving Power (um)
- L is the wavelength (um)
- NA is the numerical aperture

To calculate Resolving Power, divide the wavelength by the numerical aperture, then multiply by .61.

## How to Calculate Resolving Power?

The following steps outline how to calculate the Resolving Power.

- First, determine the wavelength (um).
- Next, determine the numerical aperture.
- Next, gather the formula from above = e = .61 * L/NA.
- Finally, calculate the Resolving Power.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem : **

Use the following variables as an example problem to test your knowledge.

wavelength (um) = 0.55

numerical aperture = 0.9