Understanding Quantum Physics

What did Young's double-slit experiment demonstrate about the nature of light?

• Light behaves as a wave.

• Light is neither a wave nor a particle.

• Light behaves as a particle.

• Light is a form of sound.

What was the key mystery in the photoelectric effect that Einstein addressed?

• Why light can be seen in the dark.

• Why light can bend around corners.

• Why some colors of light can eject electrons while others cannot.

• Why light travels faster than sound.

According to Einstein, what form does light take?

• Continuous waves

• Discrete particles

• Electric currents

• Magnetic fields

What paradox arises from the wave-particle duality of light?

• Light cannot travel through a vacuum.

• Light cannot be both a wave and a particle.

• Light cannot be measured accurately.

• Light cannot be seen by the human eye.

What happens to the interference pattern when electrons are measured in the double-slit experiment?

• The pattern remains unchanged.

• The pattern becomes random.

• The pattern disappears.

• The pattern becomes more pronounced.

Who developed the equation describing the wave-like behavior of electrons?

• Erwin Schrödinger

• Niels Bohr

• Albert Einstein

• Max Planck

What does the wave function represent in quantum mechanics?

• The color of light

• The speed of light

• The probability of finding a particle in a given location

• The energy of a photon

What is the Heisenberg Uncertainty Principle?

• The principle that the position and velocity of a particle cannot both be precisely determined.

• The principle that all particles have a fixed position.

• The principle that energy cannot be created or destroyed.

• The principle that light cannot be both a wave and a particle.

What was Einstein's famous objection to quantum mechanics?

• He believed God does not play dice with the universe.

• He believed light was only a wave.

• He believed quantum mechanics was a hoax.

• He believed electrons do not exist.

What does the Copenhagen interpretation suggest about quantum particles?

• They exist in a single location at a time.

• They exist in multiple states until observed.

• They have a definite velocity at all times.

• They do not exist until measured.