SHORT QUIZ Flashcards
TRUE OR FALSE
Gamma rays have longer wavelengths than radio waves
FALSE
It is the energy difference between the ground state and the excited state of electrons.
Excitation energy
It is the minimum energy needed to remove an electron from the metal surface.
work function
What is a blackbody in the context of physics?
A body that absorbs all incident radiation and emits radiation at characteristic wavelength.
TRUE or FALSE
X-rays can penetrate most materials, including soft tissues, but are absorbed by denser material like bones
TRUE
What is the implication of the Heisenberg Uncertainty principle for quantum measurements?
It suggest that any measurement disturbs the system being observed
TRUE or FALSE
Electromagnetic radiation requires a medium to travel through, like sound waves do.
FALSE
Electromagnetic radiation can travel through an empty space/ vacuum
What is an atomic emission spectra?
It is the discrete lines of light emitted by an atom when its electrons return to lower energy levels.
It is the idea that particles such as electrons exhibit both wave-like and particle-like properties
wave-particle duality
According to Planck’s law the spectrum of blackbody radiation depends on:
The temperature of the blackbody
The emission spectra of hydrogen is ____________.
made up of discrete spectral lines
In the photoelectric effect, what happens if the frequency of the incident light is below the threshold frequency?
no electrons are emitted
In context of wave-particle duality, what term describes the wavelength associated with a particle?
de broglie wavelegth
What is the photoelectric effect?
the emission of electrons from a metal surface when it absorbs electromagnetic radiation
The Rydberg formula is used to describe ________________________.
the wavelength of spectral lines in many chemical elements.
