Zusammenfassung der Ressource
P1 Topic 1 Visible light and the solar system
- The 2 theory's
- early model
(geocedntric)
- The Earth is at the
middle of the
miklyway
- this theory was
supported by the
church
- heliocentric
- the sun is at the
center of the
milkiyway
- it replaced the
Geocedntric in 1600's
- this theory was
proven by Galalio
- what visible light can tell us about the universe
- we can see things that are very far
away because they five off light
- like stars
- we can see other planets in the
universe because they reflect sunlight
- most early discoverys
were made by the naked
eye
- the discoverys more reresently were
made by telescope
- telescopes
- they magnify images
- make is so things can
be seen in more ditail
- they are telescopes on Earth but
they are also in space but to put
them there it is very expencive
- using telescopes photos of the the universe can be taken
- waves
- All waves have wavelength,
Frequency, ampiltude and speed,
- WAVELENGTH=the distance from one peak to the next
- FREQUENCY= how meany complete waves there are per-seconds, this
is measured in Hz
- AMPLITUDE= just the hight of the waves (from the mid-line to the peak)
- The SPEED is how fast it goes
- one important thing to remember is that waves transfer energy
and information- without transferring matter.
- There are two formulas for wave speed that
you need to know
- the first formula links speed, frequency and wavelength:
- Speed (V id for velocity)
- Speed= Frequency * wavelength
- V= F * λ
- Waves can be transveres or longitudinal