The Strange Universe of Gravitational Lensing

The video explores gravitational lensing, a phenomenon where light is bent by gravity, causing shifts and magnifications in the universe. It discusses Einstein's theory of relativity, Eddington's 1919 experiment, and the applications of lensing in studying galaxies and dark matter. The video also covers the measurement of cosmic distances, the analysis of quasars, and the role of weak lensing in mapping the cosmic web. Additionally, it delves into the extreme lensing around black holes and the concept of quantum tunneling, touching on various interpretations of quantum mechanics.

What phenomenon causes the deep universe to appear shifted and magnified?

• Black hole evaporation

• Gravitational lensing

• Quantum tunneling

• Dark matter interaction

Which experiment in 1919 helped verify Einstein's theory of general relativity?

• The double-slit experiment

• The Large Hadron Collider experiment

• The Michelson-Morley experiment

• The solar eclipse observation by Sir Arthur Eddington

What is the term for the extreme warping of distant galaxies' shapes due to gravitational lensing?

• Weak lensing

• Strong lensing

• Micro lensing

• Quantum lensing

What is the Einstein Cross?

• A method to measure the Hubble constant

• A type of black hole

• A type of gravitational wave

• A configuration of four images of a quasar

What is the main challenge in measuring distances in astronomy?

• Measuring the speed of light

• Determining the mass of stars

• Measuring path lengths of light

• Calculating the Hubble constant

What is the photon sphere around a black hole?

• A type of gravitational wave

• A region where light can orbit the black hole

• The event horizon of a black hole

• A region where time stops

What is required for quantum tunneling to occur?

• A lower or equal energy state

• A higher energy state

• A conscious observer

• A deterministic universe

Which interpretation of quantum mechanics suggests that a system doesn't have classical properties until observed?

• Pilot Wave theory

• Copenhagen interpretation

• String theory

• Many Worlds interpretation

What does the Copenhagen interpretation say about a physical system before observation?

• It has definite properties

• It exists as a wave function

• It is in a superposition of all possible states

• It is deterministic

What is not a favored view regarding the collapse of a wave function?

• A conscious observer is needed

• Wave function collapse is deterministic

• Wave function collapse is probabilistic

• Any irreversible interaction causes collapse