Chapter 7 (Exam 3) Flashcards
Electric and magnetic fields move perpendicular to each other and move at what speed?
The speed of light
How fast is the speed of light?
3.00x10^8 meters per second
What is amplitude of a wave?
Vertical height of the waves peaks
What does the amplitude of a wave determine?
determines the intensity of light
Frequency is equal to…
speed of light/wavelength
What is frequency measured in?
Hertz, seconds^-1
When a wavelength is short then the frequency is…
high
when a wavelength is long the frequency is…
low
Magnetic Field
A space where a magnetic particle feels a force
Electric Field
A space where a charged particle feels a force
Visible light is between what wavelengths?
400-750 nanometers
how many nanometers are in a meter?
1x10^9 or 1 million
Units for speed of light?
meters per second
Constructive interference
When peaks overlap and enter in phase. The amplitudes are added together getting bigger
Destructive interference
When peaks over lap with troughs entering out of phase. the amplitudes added together decrease or cancel
Photoelectric effect
Expormental evidence that light also behaves like a particle
the energy of a photon is equal to
H, planks constant multiplied by frequency
Planks constant
6.626 x 10^-34
Bohr Model
electrons orbit around nucleus like planets around the sun
When an electron moves to a lower energy orbit a ____ is emitted
photon
Mass of an electron
9.11 x 10^-31 kg
Uncertainty principle
an electrons position and velocity are complementary and cannot be measured simultaneously. The more accurately we know the position , the less accurately we know the velocity.
Equation for difference in energy. example n=6 to n=5
Ef-Ei= -2.18x10^-18 (1/nf2 - 1/ni2)
Angular Momentum Quantum Number (l)
An integer that determines orbital shape
L=0= s orbital
L =1= p orbital
L =2= d orbitals
L =3= f orbitals
The Spin Quantum number (ms)
specifies the spin of an electron spin up (+1/2) spin down (-1/2)
Orbital shape is determined by what factor?
(L) 0 1 2 3
s p d f
Put in order of increasing wavelength Infared Microwave UV radio
Ultraviolet, Infrared, Microwaves, Radio Waves
Put in order of increasing energy per photon
Radio Waves, Infrared, Microwaves, Radio Waves
