Quantum Mechanics Quiz

Who made a bold suggestion in 1900 that radiation energy is emitted in discrete packets called quanta?

• Erwin Schrödinger

• Albert Einstein

• Niels Bohr

• Max Planck

Which physicist discovered that energy comes in discrete steps or packets, leading to the quantum nature of energy?

• Niels Bohr

• Max Planck

• Erwin Schrödinger

• Albert Einstein

In the photoelectric effect, the kinetic energy of emitted electrons depends on which property of the radiation?

• Speed

• Wavelength

• Intensity

• Frequency

Who explained the Compton effect in terms of the scattering by electrons of individual photons?

• Niels Bohr

• Albert Einstein

• Erwin Schrödinger

• Max Planck

De Broglie's wave hypothesis suggested that material particles can behave as what?

• Particles

• Waves

• Atoms

• Photons

According to Niels Bohr in 1913, what happens when an electron makes a transition from a state with higher energy to one with lower energy?

• Energy is converted

• Energy remains constant

• Energy is emitted

• Energy is absorbed

What is the fundamental concept in quantum mechanics that states there is a limit to the precision with which certain pairs of physical properties can be simultaneously known?

• Uncertainty principle

• Conservation principle

• Relativity principle

• Quantum principle

What is the standard deviation of an observable in quantum physics also known as?

• Uncertainty

• Dispersion

• Variance

• Expectation value

Which equation describes the time evolution of a quantum mechanical system?

• Newton's second law

• Einstein's field equations

• Heisenberg's uncertainty principle

• Schrödinger wave equation

What is the operator used to obtain physical information about an observable in quantum mechanics?

• Tensor

• Matrix

• Scalar

• Operator