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2009060
P1A Topic 1
Description
Summary of the topic with everything you need for the exam
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edexcel
edexcel physics
gcse
gcse edexcel
p1a
p1a topic1
topic 1
p1a topic 1
visible light and the solar system
a level
Mind Map by
James Disley
, updated more than 1 year ago
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Created by
James Disley
over 9 years ago
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Resource summary
P1A Topic 1
Solar System
Geocentric Model
Ancient greeks
Everything orbited the earth in circles
Heilocentric model
Introduced Copernicus 1543
Condemned by the church
Galileos observation of Jupiter's moons
Sun
Current model
Ellipiticals
Waves
Properties
Amplitude (height of the wave)
Frequency (waves per second)
Wavelength (distance of one peak to the next)
Speed (How fast)
2 types
Transverse (the vibrations are 90 degrees to the direction of travel)
Longitudinal (the vibrations are along the same direction of travel)
Waves transfer energy and information without transferring matter.
Reflection
Wave hits boundary between one medium and another.
The angle of reflection r is the same as the angle of incidence i
Occurs because of a change in density.
air to glass.
Refraction
EM waves travel slower in more dense.
Hits face on, no refraction, same direction.
Hits at a angle wave changes direction.
bending effect
Air to glass bends towards the normal
Glass to air bends away from the normal
Lenses
Converging lens (convex)
Causes rays to converge to a focus
Diverging lens (concave)
Causes rays to diverge
Focal point one at the front, one at the back.
Focal length
Distance from the lens to its focal point
A real image is there (projected on a screen) a virtual is not (can not be projected on a screen)
Telescopes
Refracting telescope
In a refracting telescope, the objective lens forms a image inside the tube. Eyepiece then magnify's it.
Objective lens = Convex lens
The rays are so far away they're pretty much parellel
Reflecting telescope
Uses two mirrors and a eyepiece lens.
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