Dawn of Modern Physics MCQs with Answers

What is the term for the process where an electron jumps from a higher energy level to a lower one, emitting a photon?

Who discovered the photoelectric effect?

Who developed the theory of special relativity in 1905?

Who proposed the concept of quantized energy levels for electrons in atoms in 1913?

What is the term for the emission of light by a substance after it has been excited by external energy?

Who discovered the quantization of light energy in 1900?

Who proposed the concept of quantized energy levels in blackbody radiation in 1900?

Who developed the mathematical formalism of quantum mechanics in 1925?

Who discovered the nucleus of the atom in 1911?

Who formulated the theory of relativity in 1905?

What is the smallest unit of light called?

What is the term for the minimum amount of energy that can be gained or lost by an atom?

What is the term for the phenomenon where light behaves as both a wave and a particle?

Who discovered the quantization of electric charge in 1909?

What is the term for the study of atomic and molecular interactions with electromagnetic radiation?

What is the phenomenon where light is scattered by charged particles?

What is the phenomenon where charged particles are deflected by a magnetic field, allowing their mass-to-charge ratio to be determined?

What is the process of measuring both the position and momentum of a particle simultaneously to a high degree of precision impossible?

Who discovered the concept of wave-particle duality in 1905?

Who proposed the concept of quantized orbits for electrons in atoms in 1913?

What is the term for the effect where the wavelength of X-rays changes when scattered by electrons?

What is the phenomenon where electrons are emitted from a material when light of certain frequencies shines on it?

What is the study of the behavior of matter and light on the atomic and subatomic scale called?

What is the term for the phenomenon where a moving source of waves changes the observed frequency of the waves?

Who discovered the quantization of energy levels in atoms in 1913?

Who discovered the wave nature of matter in 1927?

What is the term for the quantized units of electromagnetic radiation?

Who developed the uncertainty principle in 1927?

Who discovered X-rays in 1895?

What is the term for the process where a substance absorbs light energy and re-emits it as visible light?

Who developed the mathematical formulation of special relativity in 1905?

Who introduced the concept of quantization of energy in 1900?

What is the unit of energy equivalent to one electron volt?

Who developed the theory of general relativity in 1915?

What is the term for the emission of light by atoms or molecules excited to higher energy levels?

What is the name of the equation that describes the behavior of matter and energy on the atomic scale?

What is the principle that matter and energy are interchangeable, represented by the equation E=mc^2?

Who proposed the concept of wave-particle duality of light in 1924?

Who proposed the Bohr model of the atom in 1913?

Who discovered the quantization of angular momentum in 1925?