Chapter 7 Flashcards
(125 cards)
Energy propagated by energetic and magnetic field that increases and then increases in intensity?
electromagnetic radiation
How is electromagnetic radiation described/
by a wave model
What is the wavelength?
What is it represented by?
What is it usually measured in?
distance between the crests of waves
ƛ
nm
What is the frequency?
What is it represented by?
What is it usually measured in?
cycles per second
Greek letter nu (𝜈)
Hertz (Hz) [s^-1]
Relationship between wavelength and frequency?
wavelength increases
frequency decreases
When does the wavelength get more harmful?
the lower it is the more harmful
What is the velocity?
What is it represented by?
What is it usually measured in?
distance a wave can travel per unit time
v
m/s
What is the speed of light?
c = 3.00 x10^8 m/s
What is the equation for velocity?
v = ƛ𝜈
What is the amplitude?
What is it represented by?
What is it usually measured in?
height of crests, depth of troughs
A?
meters
What is amplitude related to?
intensity
What is the relationship between amplitude and intensity/
Amplitude increase, then Intensity increase
What does intensity depend on?
different colors
What causes a change in amplitude?
change in intensity
What is an example of refraction?
rainbows
What is an example of diffraction?
awarenesses that a flashlight is on
Waves travel at different speeds through different media, the transition causes a change in direction?
refraction
Does matter refract or diffract like energy does?
no
Waves bend around the edges of an object?
diffraction
What is blackbody radiation?
an object emitting light when it is heated
As heat is increased to an object, what happens/
the light changes color
What relation does the blackbody radiation show/
relationship between heat & light intensity/wavelength (ƛ)
Who takes the first steps of quantum theory and what did he say?
max planck
objects emit only certain quantities of energy
What equation did plank come up with?
E = nh𝜈