Unit 7 And 8 Flashcards
Lower wavelength =
Higher frequency
Light with large frequency has (blank) E and (blank) v
Small
Light with short frequency has a (blank) E and (blank) v
Large
C =
Speed of light constant - 2.998 x 10^8
Wavelength units
M or nm
Frequency units
S^-1
Energy units
J
h units and what it stands for
Plancks constant - 6.626 x 10^-34 J/s
Wavelength =
c / v
The light from a yellow signal has a wavelength of 595 nm, and that from a green signal has a wavelength of 500 nm. Which has the higher frequency?
Green
The elevations at which the doors of an elevator open is a what?
Quantized value
If an electron jumps from its ground state to n= 3, energy is (blank), and the reaction is (blank).
Absorbed
Endothermic
If an electron transitions from n=5 to n=4, energy is (blank), and the reaction is (blank)
Emitted
Exothermic
What is the essence of the Heisenberg Uncertainty Principle?
We can’t know where an electron is AND where an electron is going at the same time.
Finding deBroglie wavelength (in nm) of a proton
Wavelength = plancks constant divided by (mass x velocity)
E =
(h)(frequency) or (hc)(wavelength)
C =
Wavelength x frequency
Change in E =
-Rh (1/n^2 final - 1/n^2 initial)
Frequency is measure in units of
Hz or 1/S or s^-1
E equals what is words
Energy of one photon with a frequency of v
H =
Plancks constant
6.626 x 10^-34 J
C = speed of light =
3.0 x 10^8 m/s
Rh =
2.18 x 10^-18 J
List the light spectrum in order
Radio waves- microwaves - infrared- ultraviolet- X-rays- gamma
Longer wavelength to shorter wavelength
Where does visible light fall on the spectrum?
Between infrared and ultraviolet
Visible light spectrum
ROYGBIV
700 nm to 400 nm
The distance from crest or trough to trough on a wave
Wavelength
The # of crests of a wave that pass a stationary point of reference per second
Frequency
The height of the crest or depth of the trough of a wave with respect to the center line of the wave
Amplitude
The smallest discrete quantity of a particular form of energy
Quantum
Having values restricted to whole-number multiples of a delicacy base value
Quantized
Maximum height of wave
Amplitude
Point of zero amplitude
Node
Which LED emits higher energy? Blue (470 nm) or green (520 nm)
Blue
Which laser emits light with the higher frequency? Red (650 nm) and green (532 nm)
Green
A # that specifies the energy and location of an electron in an atom
Quantum #
What is the longest wavelength of light that could produce e-?
Work function divided by h
Bohr’s greatest contribution to science was in building a (blank)
Simple model of the atom
Electron can only exist in discrete orbits or (blank) energy states
Quantized
Energy of electron equation
-Rh(1/n^2)
