Is it possible to use extension tubes with modern nikon camera for macro photography?

Is it possible to use extension tubes with modern nikon camera for macro photography?

Added (1).. I have a macro lens but I want to extend it

Yes absolutely - it's one way of doing macro without investing in a macro lens. There are two types - basic plastic tubes or the type with electrical connections which will allow you to continue to use focus/metering with your lens.

Do it all the time.