# Blog

## What is the formula for U in UV X dV? ## What is the UV formula for differentiation and integration?

• The uv differentiation formula for two functions is as follows. (uv)' = u'.v + u.v' Also the two functions are often represented as f(x), and g(x), and the differentiation of the product of these two functions is d/dx (f(x).g(x)) = g(x).d/dx f(x) + f(x). d/dx g(x). Similar to this uv formula in differentiation, we have a uv formula for integration.

## How do you calculate the UV effect of a light?

• 280 x 1.06 x 0.73 = 216.7. The final step of the calculation scales the total UV effect, dividing it by 25 and rounding to the nearest whole number. The result is a number that usually ranges from 0 (darkness or very weak sunlight) to the mid-teens (very strong sunlight).

## How do I compute the UV index?

•  The following steps below are instructions on how to compute the UV Index on your own. Begin with initial data that is captured by two National Oceanic and Atmospheric Administration (NOAA) satellites. This data includes global ozone levels that help forecasters determine the levels of ozone they think will exist 24 hours later.  