P1 Unit 1: Visible Light and the Solar System.

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  • Created by: nicola
  • Created on: 16-04-15 23:16
What is the Geocentric model?
EARTH AT THE CENTRE AND EVERTHING ORBITS IT. Consits of the Earth, Moon, Sun, five planets, and a fix dome of stars.
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What is the Heliocentric model?
SUN AT THE CENTRE AND EVERTHING ORBIT IT EXPECT FOR THE MOONS WHICH ORBIT THEIR PLANETS. Consits of Earth, Sun, five planets moons and a fixed dome of stars.
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What is the present day model of the Solar System?
Sun at the centre, eight planets that have elliptical orbit, some planets have moons.
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How do we see luminious and non-luminious object in space?
We see starts in spaces because they are luminous, they emit light which goes into our eyes. we see non-lumisous object because light from the sun reflects off them into our eyes.
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How did Gelieo observation of Juptier's moon disprove the Geocentric model
While observing Jupiter through a telescope Galileo saw the moons of Juptier orbiting it. As the Geocentric model staes everything orbits the Earth Galileo realised the Geocentric model had to be wrong.
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How do we observe the universe with our naked eye?
We can only detect bright close objects, including Mercury, Venus, Earth, mars, Juptier and sturn, and close by the stars including the Sun,
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How do we observe the universe with telescopes?
Telescopes gather more light and magnify. They makes clearer and brighter images enabling us to see further and dimmer objects with more detail. alowed the discovery of the outer planets.
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How do we observe the universe with photgrahy?
Cameras shutter can be left open for long periods of time thus allowing a lot of light to be ggathered and therfore very and distant objects to be seen. Also useful for recording positions of objects and therfore by comparsion detecting movement.
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How do you measure the focal lenght of a lens?
1. Point the lens at a distant object. 2. MOve a screen backwards and forwards behind the lens until a sharp image is formed. 3. Measure the distant between the screen and the centre of the lens.
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What is a real images?
A real image can be formed on a screen.
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what is a virtual screen?
A virtual image cannot be formed on screen.
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What makes a lens more magnific?
The fatter (more cuved) the lens had the greater the magnification.
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What is a simple telescope?
The objective (conversing) lens (the one near the object) makes an image. The eyepiece lens (the one near the eye) magnifies the images.
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What ia a reflecting telescope?
the objective (concave) moirror makes an image the eypiece lens magnifies the image.
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What is reflecting?
Bounce off a boundary between one medium and another. (angle of incident = angle of relection).
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What is refracting?
Change direction when travelling from one medium into another due to a change in speed. Towards the normal when travelling from a less dense to a more dense medium as the wave slow down. Away from the normal when travelling from a more dense medium t
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What id the normal?
An imagunary line drawn at the right aangles to the surface wher the light ray hits, which is used to measure the angles from.
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What can all all waves do?
All waves can transfer energy and information but cannot transfer matter
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What are Longitudinal waves?
They are oscillate (vibrate) in the same direction as the direction of travel. For example Ultrasound, Sound, Infrasound and P-waves.
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What are transverse waves?
They are oscillate (vibrate) at right angles to the direction of travel. For example Light, sea waves, s-waves and all electromagnic waves.
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What is the wavelength?
The distance from one point on a wave (e.g. peak) to the same point on the next wave (e.g. the next point). (m)
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What is the frequency?
The number of waves passing a point every second. (Hz)
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What is the amplitude?
The distance from the crest (or trough) of a wave to its rest position. (m).
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What is the formula for speed, frequency and wavelength?
Speed (m/s) = Frequency (Hz) x Wavelength (m).
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What is the formula for waves speed, distance and time?
Wave speed (m/s) = distance (m) / time (s)
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Other cards in this set

Card 2

Front

What is the Heliocentric model?

Back

SUN AT THE CENTRE AND EVERTHING ORBIT IT EXPECT FOR THE MOONS WHICH ORBIT THEIR PLANETS. Consits of Earth, Sun, five planets moons and a fixed dome of stars.

Card 3

Front

What is the present day model of the Solar System?

Back

Preview of the front of card 3

Card 4

Front

How do we see luminious and non-luminious object in space?

Back

Preview of the front of card 4

Card 5

Front

How did Gelieo observation of Juptier's moon disprove the Geocentric model

Back

Preview of the front of card 5
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