Wave Particle Duality

Explain Wave-Particle Duality Model.

• Assumes that light travels in straight lines and exhibits particle-like behavior.

• Explains various optical phenomena, including interference, diffraction, reflection, and refraction and describes light as a transverse electromagnetic wave.

• Light (photons) striking a material surface can eject electrons, and the kinetic energy of these ejected electrons is dependent on the frequency (color) of the incident light, not its intensity.

• Describes particles, such as electrons and photons, as having both wave and particle properties depending on the experimental conditions.

Tags

NGSS.HS-PS4-3

Analyze which of the statements below does not refer to photons.

• Photons are elementary particles and are considered to be massless.

• Photons are electrically charged; they carry a positive, electric charge.

• Photons have both wave and particle properties.

• Photons are emitted during the photoelectric effect.

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NGSS.HS-PS4-3

NGSS.HS-PS4-4

The tendency of some particles to act like matter in public and like waves of energy when no one's looking may be a problem in the way physicists study particles, not the way particles behave.

• True - The methods used by physicists are to blame

• False - Particles really have dual nature

Tags

NGSS.HS-PS4-3

Which of the following experiment suggested the wave nature of electrons?

• the emission of electrons when electromagnetic radiation, such as light, hits a material.

• diffraction of electrons by the surface of Nickel metal

• radioactive decay in which a fast energetic electron or positron is emitted from an atomic nucleus,

• streams of electrons observed if an evacuated glass tube is equipped with two electrodes and a high voltage is applied

Tags

NGSS.HS-PS4-3

Which of the following statement is correct?

• No particle whether at rest or in motion is ever accompanied by matter waves

• Any particle in motion, whether charged or uncharged is accompanied by matter waves

• Only subatomic particles in motion are accompanied by matter waves

• Only a charged particles in motion are accompanied by matter waves

Tags

NGSS.HS-PS4-3

Large objects can move with great momentum. Why then is it difficult to see their wave-like nature?

• Their wavelength is equal to the object’s size.

• Their wavelength is very small compared to the object’s size.

• Their wavelength is very large compared to the object’s size.

• Their frequency is very small compared to the object’s size.

Tags

NGSS.HS-PS4-1

If a protons and an alpha particle have the same de-Broglie wavelength. What is same for both of them ?

• Energy

• Time period

• Frequency

• Momentum

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

During bond formation, atomic orbitals (waves) interfere with each other to create molecular orbitals. Molecular orbitals are also wavefunctions

• True

• False

Tags

NGSS.HS-PS4-3

The Heisenberg’s uncertainty principle states that there is a fundamental limit to the accuracy with which the position and momentum of a particle can simultaneously be known or jointly measured. Position and momentum are called complementary variables and there are other complementary pair of variable that exists for any quantum particle.

• True

• False

Which experiment demonstrated the wave nature of light?

• Young's double-slit experiment

• Rutherford's gold foil experiment

• Millikan's oil drop experiment

• Cavendish experiment

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3