Piecewise[{ {12.92*L,L<=.0031308}, {1.055*(L^(1/2.4)) - 0.055,L>.0031308} }] where L = 0.5

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.