What are the uses of krypton? And what roles does it play? How has it changed life on earth?

Question

I already know that it is used in fluorescent lights, and fluoride lasers. Are there any other uses?

Answer 1

The high cost of obtaining krypton from the air has limited its practical applications. Krypton is used in some types of photographic flashes used in high speed photography. Some fluorescent light bulbs are filled with a mixture of krypton and argon gases. Krypton gas is also combined with other gases to make luminous signs that glow with a greenish-yellow light. In 1960, the length of the meter was defined in terms of the orange-red spectral line of krypton-86, an isotope of krypton.

So in answer to your question is no it does not have any new uses, apart from that you have mentioned. It has not really changed the world.

Answer 2

lex luthor uses a compound of krypton to weaken superman....