Source: wikibot/shapiro-time-delay
= Shapiro time delay
{wiki=Shapiro_time_delay}
The Shapiro time delay, also known as the Shapiro effect, is a phenomenon predicted by the theory of general relativity that describes how light signals take longer to travel through a gravitational field compared to traveling in a vacuum. When light passes near a massive object, such as a planet or a star, its path is bent due to the curvature of spacetime caused by the object's gravity.