It seems there might be a typo in your query, as "blueshoft" does not correspond to any widely recognized term or concept. If you meant "blue shift," this term is used in physics and astronomy to describe the phenomenon where light from an object is shifted toward shorter wavelengths, indicating that the object is moving closer to the observer. This is often associated with the Doppler effect.
If you meant something else, please provide more context or clarify the term you’re asking about, and I'll be happy to help!