Luminescence dating 

• Obtaining the date of specific events in the past through "measuring the amount of light emitted from energy storied in certain rocks and derived soils." [link]

Satellite archaeology 

• Looking at different parts of the light spectrum on satellite
  images to map archaeological sites providing archaeologists
  with a detailed overview of ancient environmental features 
  [link]

Ground penetrating radar 

• Used for looking below the earths surface to determine if
  there are objects. This technique sends electromagnetic
  pulses which bounce back after hitting an object, determining
  where and how deep the object is. [link]

Archaeolinguistics 

• Using archaeology and linguistics to determine aspects
  of past cultures, including studying the evolution of language
  and symbols [link]