Homework 1 Before Test 2 Flashcards
Light interacts with matter: examples of transmission
- Visible light meets clear glass
2. Cell phone signals pass through walls
How light interacts with matter: Absorption
- Visible light does not pas through a black wall
2. Blue light hits a red sweater
Light interacts with matter: reflection or scattering
- Red light hits a red sweatshirt
2. White light hits a white piece of paper
Light interacts with matter: emission
- Light comes from your computer screen
2. Light comes from a light bulb
How much stronger is the gravitation pull of the sun on earth at 1 AU than it is on Saturn at 10 AU
100
Distance relationship to gravitation pull
Inverse square relationship
If the mass of one object is doubled
The force between the two objects is doubled
The force of gravity is inversely proportional to?
The square of the distance that separates the two objects
The number of waves that pass a point each second measures?
Frequency
Violet wavelengths are shorter than which colors (not all of them but the ones listed are included I think)
Blue yellow orange
What determines the color of a beam of light?
It’s frequency or it’s wavelength
Red light frequency and wave length
Frequency: 4.3 x 10^14
Wavelength: 7.0 x 10^-7
Violet light frequency and wavelength
Frequency: 7.5 x 10^14
Wavelength: 4.0 x 10^-7
All other visible light colors have frequencies and wavelengths between which two colors that are the extremes on both ends of the spectrum?
Violet and red
A nanometer (nm) is how many meters ?
One billionth of a meter
