Asked by Anonymous

what will happen when potassium liliac colored flame is viewed through blue glass
Answered by DrBob 222
The flame color will be visible as a reddish violet color. The blue glass, typically a cobalt blue glass, will filter out extraneous colors, such as the intense yellow color of a sodium flame. The intense yellow color of the sodium flame will mask the potassium flame unless something like the cobalt blue filter is used.