Splash Biography
XING LIU, astrophysics(?) student
Major: Physics College/Employer: UC Berkeley Year of Graduation: 2027 

Brief Biographical Sketch:
Undergrad at UC Berkeley interested in observational cosmology and highenergy physics. xingyzt.net Past Classes(Clicking a class title will bring you to the course's section of the corresponding course catalog)S1200: Tensor Algebra: The language of special relativity in Splash Spring 2024 (Apr. 21, 2024)
An gentle introduction to tensors, the mathematical objects whose implicit weaving of space and time serves as the framework to build the theories of special and general relativity.
S1174: Inflationary Cosmology: The Instant After the Big Bang in Splash Fall 2023 (Nov. 18, 2023)
Five decades ago, the Big Bang theory faced a crisis: Compared to its predictions of how the universe began, actual largescale observations showed that our universe is, in a sense, too boring — Its density is too "uniform", its shape too "flat", and its magnetic monopoles? seemingly nonexistent! What resolved this crisis came to revolutionize the field of theoretical cosmology.
This course will start off by deriving a model of our expanding universe from some basic principles of introductory physics. Applying this model to realworld data, we will discover for ourselves the aforementioned paradoxes.
Then, in the second hour, we will introduce the theory of inflationary cosmology: its physics are too complex to derive, but we can glean from simple approximations how it is able to resolve these paradoxes, and make new predictions about our universe.
M1175: Raytracing: Rendering Virtual 3D Worlds in Splash Fall 2023 (Nov. 18, 2023)
How do video games and 3D animations look so real? An introduction to the physics, then the code, of raytracing and raymarching algorithms.
S1178: Einstein's Theory of Relativity in Splash Fall 2023 (Nov. 18, 2023)
In the early 20th century, physicists made a surprising discovery: light appear to travel at the same speed in space no matter how fast you are moving. From this seemingly paradoxical observation, and a little bit of geometry, we present a derivation for the basics of Einstein's theory of special relativity.
