Karteikarten
P1 Chapter 5 and 6 notes from exercise book
Karten in diesem Stapel (19)
- 1MECHANICAL WAVES...require a medium to travel through. The can be transverse or longitudinal.
- 2ELECTROMAGNETIC WAVES...are waves that can travel through a vacuum (at the speed of light). They are always transverse.
- 3TRANSVERSE WAVE MOTION...is when displacement is at a right angle/perpendicular to the direction of the wave.
- 4LONGITUDINAL WAVES MOTION...is when wave motion is parallel to the direction of the wave.
- 5AMPLITUDE...is the distance from the equilibrium position to a crest or trough
- 6WAVELENGTH...is the distance between two crests or two troughs or two like points on a wave.
- 7FREQUENCY...is the number of waves passing a point in a second.
- 8WAVE SPEED EQUATIONSpeed = Frequency x Wavelength
v = f x λ - 9LAW OF REFLECTION... is the angle of incidence = the angle of reflection
- 10REFRACTION...is when waves speed up or slow down due to travelling in a differen medium.
- 11MEDIUM...is something that waves will travel through
- 12HOW IS A RAINBOW FORMED?When a beam of white light hits a raindrop at a particular angle the different colours that make up the rainbow separate. The angle for each colour of the rainbow is different because colours slow down at different speeds when they hit the raindrop.
- 13DIFFRACTION...is the spreading out of waves when they pass through a gap or move past and obstacle. The wavelength stays the same before and after the gap.
- 14LIST THE ELECTROMAGNETIC SPECTRUM (THERE ARE 6)- Radio waves
- Microwaves
- Infrared
- Light
- Ultraviolet
- Gamma rays and X-rays - 15STEADY STATE THEORY... is the expansion of the universe caused by matter leaking through "white holes"
- 16THE BIG BANG THEORY...the universe began with a big expansion from a single point in space.
- 17EVIDENCE OF THE BIG BANGScientists have found Cosmic Microwave Background Radiation (CMBR) which is radiation left from a Big Bang. As the universe expanded this gamma radiation stretched into the microwave region. This is evidence the Big Bang occured.
- 18THE RED SHIFT...is when light we see from stars or galaxies shift towards the red (side of the spectrum) due to them moving away from us.
- 19THE DOPPLER EFFECT...is when sound waves in front of a moving object are compressed because the object is moving in that direction and the sound waves behind the object are more spread out because the object is moving away from that direction. This means if the object goes past you the pitch and frequency of it gets lower.
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- Physics Karteikarten am P1 Chapter 5 and 6 notes from exercise book , erstellt von premadoraisamy5631 am 27/01/2014.
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