Enter the reflected radiation and the incident radiation into the Reflectance Calculator. The calculator will evaluate the Reflectance.

## Reflectance Formula

The following two example problems outline the steps and information needed to calculate the Reflectance.

R = (RR / IR )^2

Variables:

- R is the Reflectance ( )
- RR is the reflected radiation
- IR is the incident radiation

To calculate reflectance, divide the reflected radiation by the incident radiation, then square the result.

## How to Calculate Reflectance?

The following steps outline how to calculate the Reflectance.

- First, determine the reflected radiation.
- Next, determine the incident radiation.
- Next, gather the formula from above = R = (RR / IR )^2.
- Finally, calculate the Reflectance.
- 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.

reflected radiation = 30

incident radiation = 50

R = (RR / IR )^2** **= ?