Welcome to the 12th Class Physics Chapter 19 MCQs Practice and Quiz Tests. We are presenting you with top MCQ questions from the 12th Class Physics Chapter 19 Dawn of Modern Physics.
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Who is credited with discovering X-rays in 1895?
a) Albert Einstein
b) Marie Curie
c) Wilhelm Conrad Roentgen
d) Max Planck
The photoelectric effect, which supports the particle nature of light, was explained by:
a) Max Planck
b) Niels Bohr
c) Albert Einstein
d) Werner Heisenberg
Who proposed the Bohr model of the atom in 1913?
a) Niels Bohr
b) Ernest Rutherford
c) Werner Heisenberg
d) Max Planck
The theory of relativity was formulated by:
a) Max Planck
b) Albert Einstein
c) Niels Bohr
d) Werner Heisenberg
The famous equation E=mc^2 is associated with:
a) Max Planck
b) Marie Curie
c) Albert Einstein
d) Niels Bohr
Who proposed the wave-particle duality theory?
a) Max Planck
b) Albert Einstein
c) Niels Bohr
d) Louis de Broglie
Who introduced the concept of quantization of energy levels in atoms?
a) Max Planck
b) Albert Einstein
c) Niels Bohr
d) Werner Heisenberg
Who proposed the uncertainty principle in quantum mechanics?
a) Max Planck
b) Albert Einstein
c) Niels Bohr
d) Werner Heisenberg
Which of the following experiments demonstrated the wave-like nature of particles?
a) Photoelectric effect
b) Compton scattering
c) Double-slit experiment
d) Stern-Gerlach experiment
Who discovered the first evidence of radioactivity?
a) Wilhelm Conrad Roentgen
b) Marie Curie
c) Max Planck
d) Ernest Rutherford
The concept of quantization of angular momentum in atoms was proposed by:
a) Niels Bohr
b) Albert Einstein
c) Max Planck
d) Louis de Broglie
Who discovered the nucleus of the atom?
a) Niels Bohr
b) Albert Einstein
c) Max Planck
d) Ernest Rutherford
Which experiment provided evidence for the quantization of energy levels in atoms?
a) Stern-Gerlach experiment
b) Double-slit experiment
c) Compton scattering
d) Photoelectric effect
Who proposed the theory of special relativity in 1905?
a) Max Planck
b) Marie Curie
c) Albert Einstein
d) Niels Bohr
The scattering of X-rays by crystals, leading to the discovery of crystal structure, is known as:
a) Compton scattering
b) Photoelectric effect
c) X-ray diffraction
d) Double-slit experiment
Who proposed the theory of general relativity?
a) Max Planck
b) Marie Curie
c) Albert Einstein
d) Niels Bohr
The concept of quantization of electric charge was introduced by:
a) Niels Bohr
b) Albert Einstein
c) Max Planck
d) Robert Millikan
Who introduced the concept of blackbody radiation and the Planck’s law?
a) Max Planck
b) Marie Curie
c) Albert Einstein
d) Niels Bohr
The phenomenon of electrons behaving as both particles and waves is known as:
a) Photoelectric effect
b) Quantum tunneling
c) Wave-particle duality
d) Blackbody radiation
Who conducted the famous oil drop experiment to measure the charge of an electron?
a) Robert Millikan
b) Albert Einstein
c) Max Planck
d) Niels Bohr
The bending of light around a massive object, such as a star, due to gravity is predicted by:
a) Max Planck
b) Marie Curie
c) Albert Einstein
d) Niels Bohr
The Bohr model successfully explained the spectra of which element?
a) Hydrogen
b) Helium
c) Carbon
d) Oxygen
Who discovered the concept of radioactivity during his experiments with uranium salts?
a) Wilhelm Conrad Roentgen
b) Marie Curie
c) Max Planck
d) Ernest Rutherford
The theory of relativity consists of two parts: special relativity and:
a) Quantum mechanics
b) General relativity
c) Photoelectric effect
d) X-ray diffraction
Who proposed the idea of quantization of energy levels in molecules and the quantized vibrational states of diatomic molecules?
a) Max Planck
b) Niels Bohr
c) Albert Einstein
d) Max Born
Who introduced the concept of the photon as a discrete packet of light energy?
a) Max Planck
b) Marie Curie
c) Albert Einstein
d) Niels Bohr
The concept of quantization of angular momentum is also known as:
a) Planck’s constant
b) Bohr’s model
c) De Broglie wavelength
d) Quantized orbits
Who formulated the Schrödinger wave equation in quantum mechanics?
a) Erwin Schrödinger
b) Werner Heisenberg
c) Max Born
d) Louis de Broglie
The concept of the wave function in quantum mechanics is associated with:
a) Werner Heisenberg
b) Louis de Broglie
c) Max Born
d) Erwin Schrödinger
Who conducted the famous double-slit experiment with electrons to demonstrate wave- particle duality?
a) Max Planck
b) Albert Einstein
c) Louis de Broglie
d) Thomas Young
Who proposed the concept of quantization of electron orbits in atoms to explain the atomic spectra?
a) Werner Heisenberg
b) Louis de Broglie
c) Niels Bohr
d) Erwin Schrödinger
The concept of wave-particle duality is not applicable to:
a) Electrons
b) Photons
c) Protons
d) Neutrons
Who proposed the concept of quantization of energy levels in molecules and the quantized vibrational states of diatomic molecules?
a) Max Planck
b) Niels Bohr
c) Albert Einstein
d) Max Born
Who introduced the concept of the photon as a discrete packet of light energy?
a) Max Planck
b) Marie Curie
c) Albert Einstein
d) Niels Bohr
The concept of quantization of angular momentum is also known as:
a) Planck’s constant
b) Bohr’s model
c) De Broglie wavelength
d) Quantized orbits
Who formulated the Schrödinger wave equation in quantum mechanics?
a) Erwin Schrödinger
b) Werner Heisenberg
c) Max Born
d) Louis de Broglie
The concept of the wave function in quantum mechanics is associated with:
a) Werner Heisenberg
b) Louis de Broglie
c) Max Born
d) Erwin Schrödinger
Who conducted the famous double-slit experiment with electrons to demonstrate wave- particle duality?
a) Max Planck
b) Albert Einstein
c) Louis de Broglie
d) Thomas Young
Who proposed the concept of quantization of electron orbits in atoms to explain the atomic spectra?
a) Werner Heisenberg
b) Louis de Broglie
c) Niels Bohr
d) Erwin Schrödinger
The concept of wave-particle duality is not applicable to:
a) Electrons
b) Photons
c) Protons
d) Neutrons
Who proposed the concept of quantization of energy levels in molecules and the quantized vibrational states of diatomic molecules?
a) Max Planck
b) Niels Bohr
c) Albert Einstein
d) Max Born
Who introduced the concept of the photon as a discrete packet of light energy?
a) Max Planck
b) Marie Curie
c) Albert Einstein
d) Niels Bohr
The concept of quantization of angular momentum is also known as:
a) Planck’s constant
b) Bohr’s model
c) De Broglie wavelength
d) Quantized orbits
Who formulated the Schrödinger wave equation in quantum mechanics?
a) Erwin Schrödinger
b) Werner Heisenberg
c) Max Born
d) Louis de Broglie
The concept of the wave function in quantum mechanics is associated with:
a) Werner Heisenberg
b) Louis de Broglie
c) Max Born
d) Erwin Schrödinger
Who conducted the famous double-slit experiment with electrons to demonstrate wave- particle duality?
a) Max Planck
b) Albert Einstein
c) Louis de Broglie
d) Thomas Young
Who proposed the concept of quantization of electron orbits in atoms to explain the atomic spectra?
a) Werner Heisenberg
b) Louis de Broglie
c) Niels Bohr
d) Erwin Schrödinger
The concept of wave-particle duality is not applicable to:
a) Electrons
b) Photons
c) Protons
d) Neutrons
Who proposed the concept of quantization of energy levels in molecules and the quantized vibrational states of diatomic molecules?
a) Max Planck
b) Niels Bohr
c) Albert Einstein
d) Max Born
Who introduced the concept of the photon as a discrete packet of light energy?
a) Max Planck
b) Marie Curie
c) Albert Einstein
d) Niels Bohr
The concept of quantization of angular momentum is also known as:
a) Planck’s constant
b) Bohr’s model
c) De Broglie wavelength
d) Quantized orbits
Who formulated the Schrödinger wave equation in quantum mechanics?
a) Erwin Schrödinger
b) Werner Heisenberg
c) Max Born
d) Louis de Broglie
The concept of the wave function in quantum mechanics is associated with:
a) Werner Heisenberg
b) Louis de Broglie
c) Max Born
d) Erwin Schrödinger
Who conducted the famous double-slit experiment with electrons to demonstrate wave- particle duality?
a) Max Planck
b) Albert Einstein
c) Louis de Broglie
d) Thomas Young
Who proposed the concept of quantization of electron orbits in atoms to explain the atomic spectra?
a) Werner Heisenberg
b) Louis de Broglie
c) Niels Bohr
d) Erwin Schrödinger
The concept of wave-particle duality is not applicable to:
a) Electrons
b) Photons
c) Protons
d) Neutrons
Who proposed the concept of quantization of energy levels in molecules and the quantized vibrational states of diatomic molecules?
a) Max Planck
b) Niels Bohr
c) Albert Einstein
d) Max Born
Who introduced the concept of the photon as a discrete packet of light energy?
a) Max Planck
b) Marie Curie
c) Albert Einstein
d) Niels Bohr
The concept of quantization of angular momentum is also known as:
a) Planck’s constant
b) Bohr’s model
c) De Broglie wavelength
d) Quantized orbits
Who formulated the Schrödinger wave equation in quantum mechanics?
a) Erwin Schrödinger
b) Werner Heisenberg
c) Max Born
d) Louis de Broglie
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