The Real Science of the EHT Black Hole

The video discusses the first-ever image of a black hole captured by the Event Horizon Telescope. It explains the science of interferometry, which combines data from multiple telescopes to achieve high resolution. The video delves into the details of the black hole in the M87 galaxy, its accretion disk, and the photon sphere. It highlights the significance of the image in confirming Einstein's theory of general relativity and the challenges faced in capturing such an image.

What significant astronomical event was revealed to the world on April 10th?

• A new type of star

• The collision of two galaxies

• The first image of a black hole

• The discovery of a new planet

What is the estimated mass of the M87 black hole?

• Less than the mass of the Sun

• Equal to the mass of the Sun

• Several million times the mass of the Sun

• Several billion times the mass of the Sun

What technique was crucial in capturing the image of the M87 black hole?

• Astrometry

• Interferometry

• Spectroscopy

• Photometry

What was one of the challenges in observing the M87 black hole?

• The lack of advanced technology

• The need for a global network of telescopes

• Its small size compared to other black holes

• Its proximity to Earth

What is the primary advantage of using interferometry in astronomy?

• It measures the temperature of stars

• It improves the resolution of images

• It allows for the detection of new planets

• It increases the brightness of distant objects

What is the photon sphere in the context of a black hole?

• A region where light can orbit the black hole

• The outermost layer of a black hole

• The area where matter is ejected from the black hole

• The center of the black hole

What type of radiation is primarily observed by the Event Horizon Telescope?

• X-ray radiation

• Synchrotron radiation

• Gamma radiation

• Thermal radiation

What does the asymmetry in the black hole's image suggest?

• The black hole is stationary

• The black hole is rotating at a high speed

• The black hole is shrinking

• The black hole is not rotating

What does the image of the black hole confirm about Einstein's theory?

• It has no relation to the theory

• It suggests modifications to the theory

• It confirms the theory's predictions

• It disproves the theory

What is the significance of the black hole's spin direction?

• It has no observable effects

• It influences the direction of the jet

• It determines the size of the black hole

• It affects the color of the black hole