Nature of light and quantum mechanics (Modules 7 and 8) quiz

Is composed of discrete corpuscles travelling in straight rays

Exhibits wave behaviour through interference

Travels faster through denser optical media

Carries momentum but never any energy

$\frac{1}{\sqrt{\epsilon_0} \cdot \mu_0}$

$\sqrt{\frac{\epsilon_0}{\mu_0}} \cdot \frac{1}{2}$

$\frac{1}{\sqrt{\epsilon_0 \mu_0}}$

$\frac{1}{2}\sqrt{\epsilon_0 \mu_0}$

Increasing the intensity of the incident light raises the kinetic energy of each ejected electron

The effect occurs only with low-frequency red light below the visible band

Electrons are ejected after a delay that shortens as the intensity rises

Electrons are ejected only above a threshold frequency, independent of intensity

$hf$

$\frac{h}{f}$

$hc$

$hf^2$

Electrons spiral continuously inward and, as they accelerate, radiate a perfectly smooth and unbroken continuous band of all possible energies

Electrons orbit in fixed quantised energy levels and emit photons of definite energy when transitioning between them

The proton at the centre is itself quantised and emits the spectral lines directly

Hydrogen possesses exactly one electron, so it can produce only a single line

Only massless photons can ever exhibit genuine wave behaviour in a vacuum

Only electrons, among all the matter particles, possess a wavelength

Matter particles have an associated wavelength $\lambda = \frac{h}{p}$

Mass and energy remain freely interchangeable at any speed

Runs faster by a factor of $\gamma = \frac{1}{\sqrt{1 - v^2/c^2}}$ in the observer's frame

Runs at exactly the same rate, since motion never affects the passage of time

Stops completely once its speed exceeds $0.5c$ relative to the observer

Runs slower by a factor of $\gamma = \frac{1}{\sqrt{1 - v^2/c^2}}$

Mass and energy are equivalent and interconvertible

Only electromagnetic radiation, and never matter, carries energy

Mass is permanently destroyed during ordinary chemical reactions

The mass of an object does not change when it gains or loses energy

The total number of nucleons decreases as the heavy nucleus splits apart

A small mass defect is converted into energy via $E = mc^2$

The total mass before the reaction equals the total mass after it

Electric charge is not conserved across the fission reaction

Lepton, in the same family as the electron and the neutrino

Fundamental quark carrying fractional electric charge

Gauge boson (mediator of the electromagnetic force)

Composite particle built from a bound trio of quarks

The exact energy of a photon can never be determined by any conceivable measurement

Travel backwards through time is forbidden for any particle with mass

Light always propagates through a vacuum carrying precisely zero rest mass

Position and momentum cannot both be known to arbitrary precision simultaneously

Wave-particle duality, established by Young's interference and the photoelectric effect, drives modern technologies from solar cells to electron microscopes via Planck's relation and de Broglie's hypothesis.

Wave-particle duality is a really interesting and surprising idea that many famous scientists have spent a very long time thinking about, and it continues to amaze students and physicists everywhere even today.

Light is sometimes a wave and sometimes a particle, which is quite confusing.

Physics is full of surprises and mysteries waiting to be discovered.