OSU CH 201 Ch3
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the range of different kinds of electromagnetic radiation
is characterized by a frequency, a wavelength, and an amplitude
Frequency (ν "nu" )
the number of wave maxima that pass by a fixed point per unit time.
a unit of frequency; 1Hz = 1s^-1
the length of a wave from one maximum to the next (Section 3.1)
a wave's height measured from the midpoint between peak and trough
- Wavelength * Frequency = Speed of light
- "lambda"(m) * "nu"(Hz) = c (m/s)
- "lambda" = c / "nu"
- "nu" = c / "lambda"
the wavelengths of light emitted by an energetically excited atom
an equation that accounts for all lines in the hydrogen spectrum
1 / "lambda" == R(oo) ((1/m^2) - (1/n^2))
R(oo) = Rydberg constant == 1.097*10^-2 nm^-1
the smallest possible amount of radiant energy; a quantum
photon energy equation
E = h*"nu" == hc/"lambda"
- h = plack's constant: 6.626*10^-34
- c = speed of light: 3.00*10^8
6.022*1023 unit of mole.
- is a unit of energy
- 1 j = 1(kg/m2)/s2
the intensity of a light beam is a measure
of the number of photonsin the beam
a measure of energies of the photons
the smallest possible amount of radiant energy
de Broglie equation
- an equation that relates mass, wavelength, and velocity, m = h/λν
- λ = h/mν
- m: mass
- h: placks constant
Quantum mechanical model
a model of atomic structure that concentrates on an electron's wavelike properties
Heisenberg uncertainty principle
- The position and the velocity of an electron can never both be known beyond a certain level of precision
- (change in x"position")(Change in Mass "nu") => h / 4"pie"
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