Black Holes and Their Properties

The video discusses the first-ever image of a black hole, captured by the Event Horizon Telescope in 2019. It explains the features of the supermassive black hole in galaxy M87, including plasma orbiting it and relativistic beaming. The video also covers the challenges of capturing such images due to the black hole's tiny apparent size and the technological limits, requiring a virtual Earth-sized telescope. Additionally, it compares M87 with Sagittarius A*, the black hole at the center of our Milky Way, and highlights the significance of these observations in confirming the existence of black holes and supporting Einstein's theory of relativity.

What is the phenomenon called when plasma appears brighter as it moves towards us at near-light speed?

• Redshift

• Gravitational Lensing

• Relativistic Beaming

• Doppler Effect

Why were radio waves with a wavelength of 1.3 millimeters used to capture the black hole image?

• They provide the clearest image

• They can penetrate the accretion disk and interstellar dust

• They are the only waves that can travel through space

• They are the most powerful waves

What is the reason we can see the jet coming towards us from the M87 black hole?

• It is closer to Earth

• Relativistic beaming makes it visible

• It is moving faster than the other jet

• It is larger than the other jet

What causes the warping of space-time around a black hole?

• The black hole's temperature

• The black hole's mass

• The black hole's rotation

• The black hole's magnetic field

Why is the image of the black hole in M87 so fuzzy?

• The black hole is too bright

• The black hole is moving too fast

• The black hole is too small

• The black hole is too far away

What technological solution was used to simulate a telescope the size of Earth?

• Using a telescope on the Moon

• Using a single large telescope

• Combining data from eight telescopes around the globe

• Using a satellite telescope

How does the mass of Sagittarius A* compare to the black hole in M87?

• It is larger

• It is twice as large

• It is smaller

• It is the same size

What is a key difference in the activity of Sagittarius A* compared to the M87 black hole?

• Sagittarius A* has no accretion disk

• Sagittarius A* is less active

• Sagittarius A* has no jets

• Sagittarius A* is more active

What does the image of the M87 black hole confirm about black holes?

• They are smaller than expected

• They do not exist

• They are a myth

• They exist

What theory is supported by the image of the M87 black hole?

• Quantum Mechanics

• General Theory of Relativity

• String Theory

• Newtonian Physics