Electromagnetic Radiation & Atomic Spectra Flashcards
What is electromagnetic radiation?
energy emitted in the form of waves or particles
What are the different types of EM radiation?
radio, microwaves, infrared, visible light, ultraviolet, x-rays, gamma
What is the range of the EM spectrum?
x10⁻¹⁴m to x10⁴
What speed does all EM travel at?
3x10⁸ m/s
What is wavenumber?
the number of waves per metre
What equation relates frequency and wavelength?
v=fƛ
What equation is the energy of a photon given by?
E=hf
What is the equation for 1 mol of photons?
E=Lhc/1000ƛ
What does quantum theory state?
that matter can only absorb or emit energy in small fixed amounts called quanta
How do electrons move up energy levels?
by absorbing the appropriate quantity of energy
What does each line in the emission spectroscopy represent?
the difference in energy between two electronic energy levels
What is spectroscopy?
the study of light
What can spectroscopy be used to determine?
the quantity and type of substance present
What can be said about white light?
it contains all colours
When is the spectrum produced not continuous?
if the light source is supplied by an element or a compound
