A black hole forms when:
a) A star explodes
b) A massive object collapses under its own gravity
c) A planet is consumed by a star
d) A comet gets trapped in a star’s gravity
The event horizon of a black hole is:
a) The point where light can escape
b) The boundary beyond which nothing can escape the black hole
c) The center of the black hole
d) A region where matter is pulled into a star
The concept of a black hole was first predicted by:
a) Albert Einstein
b) Isaac Newton
c) Karl Schwarzschild
d) Stephen Hawking
The “no hair” theorem states that:
a) Black holes have no distinguishing features
b) Black holes are composed only of dark matter
c) Black holes are invisible
d) All black holes are identical
The singularity inside a black hole refers to:
a) A dense point where matter is infinitely compressed
b) The event horizon of the black hole
c) The edge of the universe
d) The boundary where gravity is zero
Which of the following objects can form a black hole?
a) A planet with a high mass
b) A supernova remnant
c) A giant star
d) Any star larger than 8 times the mass of the sun
What happens to time as an object approaches a black hole’s event horizon?
a) Time speeds up
b) Time slows down
c) Time remains constant
d) Time stops completely
A black hole’s mass is primarily determined by:
a) The size of its event horizon
b) The amount of light it emits
c) The amount of matter it has consumed
d) Its gravitational pull on nearby objects
Which type of black hole is the smallest in terms of mass?
a) Stellar-mass black hole
b) Supermassive black hole
c) Micro black hole
d) Intermediate-mass black hole
Supermassive black holes are typically found at:
a) The center of galaxies
b) The outer edges of galaxies
c) In binary star systems
d) In nebulae
What is the Hawking radiation theory associated with black holes?
a) Black holes emit radiation from their event horizon
b) Black holes absorb all forms of radiation
c) Black holes emit energy in the form of gamma rays
d) Black holes only absorb light and emit nothing
What happens if an object crosses the event horizon of a black hole?
a) It speeds up and escapes
b) It becomes invisible
c) It is pulled in and cannot escape
d) It forms a new star
The mass of a black hole is related to its:
a) Volume
b) Density
c) Gravity
d) Temperature
What causes the intense gravitational field around a black hole?
a) Its super hot surface
b) Its rapid rotation
c) Its extremely high mass and density
d) Its emission of light
Which of the following is true about the size of a black hole?
a) The size of a black hole is determined by its mass
b) The size of a black hole is constant
c) The size of a black hole decreases over time
d) The size of a black hole is independent of its mass
What happens when a black hole consumes matter?
a) The mass of the black hole decreases
b) The black hole loses energy
c) The mass of the black hole increases
d) The black hole becomes unstable
Can a black hole emit light?
a) Yes, it can emit light from its core
b) No, it cannot emit light
c) Yes, but only at the event horizon
d) Yes, through Hawking radiation
The formation of a black hole is typically associated with:
a) The cooling of a star
b) The death of a massive star
c) The collision of two planets
d) A comet entering the solar system
What is the Schwarzschild radius of a black hole?
a) The distance from the event horizon to the singularity
b) The distance at which light is bent around a black hole
c) The radius at which the escape velocity equals the speed of light
d) The radius of the event horizon
Which of the following is an observational effect that suggests the presence of a black hole?
a) The bending of light around a star
b) The absence of visible radiation from a region of space
c) The distortion of time in nearby space
d) The formation of new stars
What is a gravitational lens effect caused by a black hole?
a) Light passing close to a black hole is bent and distorted
b) Light is absorbed by the black hole
c) Light is scattered away from the black hole
d) Light turns into energy inside a black hole
Can black holes merge?
a) No, they never merge
b) Yes, they can merge and form larger black holes
c) Yes, but only if they are in different galaxies
d) No, black holes repel each other
The concept of escape velocity at a black hole’s event horizon is:
a) The velocity at which matter is released
b) The velocity at which light can escape
c) The velocity at which nothing, not even light, can escape
d) The velocity at which an object reaches the speed of light
What is the primary method scientists use to detect black holes?
a) Observation of light emitted by the black hole
b) Detecting gravitational waves
c) Measuring temperature fluctuations in nearby stars
d) Direct observation of the black hole’s event horizon
The first black hole ever detected was:
a) Sagittarius A*
b) Cygnus X-1
c) LIGO
d) M87
The famous equation,
𝐸
=
𝑚
𝑐
2
E=mc
2
, relates to the energy and mass of:
a) Black holes
b) Photons near a black hole
c) The escape velocity of a black hole
d) Matter and energy, explaining the potential energy of black holes
The concept of black holes challenges which theory in modern physics?
a) General relativity
b) The theory of electromagnetism
c) Quantum mechanics
d) Thermodynamics
How do black holes affect the surrounding space-time fabric?
a) They cause it to stretch and bend dramatically
b) They have no effect on space-time
c) They flatten space-time completely
d) They create voids in space
If an object enters a black hole, it would be subjected to:
a) Extreme heating
b) Immense gravitational forces
c) Complete disappearance from the universe
d) None of the above
What happens to an object when it approaches the event horizon of a black hole?
a) It slows down and stops moving
b) It accelerates and never escapes
c) It burns up instantly
d) It stays the same size
The discovery of gravitational waves provides evidence for:
a) The existence of black holes
b) The expansion of the universe
c) Dark matter
d) Time travel
The intense gravitational pull of a black hole can warp space-time so much that:
a) It creates a new universe
b) Time moves slower near it
c) It erases information
d) It accelerates space expansion
What is the term for the process of objects being stretched as they approach a black hole?
a) Gravitational lensing
b) Spaghettification
c) Time dilation
d) Event horizon expansion
