Tru Physics

Tag: Gravitational Lensing

  • Shapiro Time Delay

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    Introduction The Shapiro time delay, also known as the fourth test of general relativity, describes the effect of time delay on light as it passes close to a massive object. Predicted by Irwin Shapiro in 1964, this effect is caused by the curvature of spacetime around the object, resulting in a longer path that the…

  • Gravitational Lensing

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    Introduction Gravitational lensing is a phenomenon that occurs when a huge mass creates a gravitational field that distorts and focuses light passing near it. This effect was first predicted by Albert Einstein’s General Theory of Relativity and has since been confirmed by multiple observations. Basics of Gravitational Lensing According to General Relativity, a mass curves…