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Merch
Quizzes
FAQ
About
Links
Blog
Universe & Physics
What does the cosmological constant represent in Einstein's field equations?
Mass of black holes
Gravitational pull of stars
Speed of cosmic expansion
Energy density of empty space (vacuum energy)
None
According to quantum field theory, what mediates the electromagnetic force?
Gluons
Photons
Higgs bosons
Gravitons
None
What is the current best estimate for the age of the universe?
13.8 billion years
9.7 billion years
7.2 billion years
20.4 billion years
None
What causes time dilation in special relativity?
Acceleration in zero gravity
Relative motion between observers at high speeds
Atmospheric interference
Changes in gravitational potential
None
What is the theoretical limit beyond which no information can escape a black hole?
The event horizon
The accretion disk
The singularity core
The Hawking boundary
None
What is the primary evidence for the existence of dark matter?
Radiation detected from distant galaxies
Gravitational effects on visible matter and galaxy rotation curves
Magnetic fields in galaxy clusters
Fluctuations in background neutrino levels
None
What phenomenon occurs when light moves away from a gravitational field?
Photon splitting
Lensing reflection
Doppler compression
Gravitational redshift
None
What is the Planck length thought to represent?
The length of a light pulse
The smallest meaningful length in physics
The wavelength of cosmic radiation
The radius of a proton
None
Which cosmic event is thought to have produced the first elements in the universe?
Supernova explosions
Cosmic inflation
Neutron star collisions
Big Bang nucleosynthesis
None
Which force is considered the weakest but has infinite range?
Strong nuclear force
Electromagnetic force
Weak nuclear force
Gravitational force
None
Time's up
