1531639
Description
Mind Map by Joseph Tedds, updated more than 1 year ago
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Created by Joseph Tedds
over 9 years ago
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AQA GCSE Science P1b Waves
- Wave Basics
- High amplitude -
High Volume
- High Frequency - High Pitch
- High Frequency - Short Wavelength
- Wave speed (m/s) = Frequency (Hz) x Wavelength (m)
- High amplitude -
High Volume
- Diffraction
- To increase diffraction, decrease
the gap or increase the
wavelength
- Waves diffract when they go
through a gap that is larger than
their wavelength
- The most diffraction happens when the
gap is the same size as the wave
- To increase diffraction, decrease
the gap or increase the
wavelength
- Refraction
- Waves refract because when
they enter a medium they
change speed
- Waves slow down
entering the medium and
speed up exiting it
- Waves refract because when
they enter a medium they
change speed
- Types of waves
- Transverse
- Electromagnetic waves
- Electromagnetic waves
- Longitudinal
- Sound waves
- Seismic Waves
- Sound waves
- Transverse
- Reflection
- Angle of incidence = Angle of reflection
- The normal is an imaginary line
perpendicular to the surface
- Angle of incidence = Angle of reflection
- Uses of waves
- Infrared
- TV Remotes
- Optical Cables
- TV Remotes
- Visible Light
- Optical Cables
- Camera
- The aperture determines the amount of light let in
- The shutter time determines how
long the sensor/film is exposed to
the light
- The aperture determines the amount of light let in
- Optical Cables
- Microwaves
- Satellites
- TV
- GPS
- Phone
- TV
- Can go through the cloud and
water vapour layer in the atmosphere
- Satellites
- Infrared
- Radio Waves
- Transverse
- Short length radio
waves reflect off
the ionosphere and
the earth.
- Short length radio waves do not work around hills
and valleys as the wave has to directly reach the
receiver as it can not go far through buildings or
land masses
- Long radio waves diffract around
the earth and so are not blocked by
landmasses such as hills or valleys
- Transverse
- Electromagnetic Spectrum
- Radio Waves
- Microwaves
- Infrared
- Visible Light
- Ultra violet
- X-Ray
- Gamma Ray
- Frequency increases along the spectrum and so wavelength decreases
- Radio Waves
- Doppler Effect
- Observed frequency of wave
increases as object moves
towards you so the sound
seem higher
- Observed frequency of
wave decreases as object
moves away from you so
the sound seems lower
- As galaxies move
further away from us
they shift towards the
red end of the
spectrum
- Observed frequency of wave
increases as object moves
towards you so the sound
seem higher
- Origin of the Universe
- The Big Bang Theory
- Everything as we know it was
compressed into the tiniest space
imaginable and then it exploded
- This isn't quite right because the
rate of expansion should be
slowing down but it's speeding up
- Cosmic Background Microwave Radiation
- This is proof for The Big Bang Theory
- Everything is cooling down after the
expansion and so the frequency of the
radiation is now given off as microwaves
- This is proof for The Big Bang Theory
- Everything as we know it was
compressed into the tiniest space
imaginable and then it exploded
- Steady State Theory
- The theory that everything was
always here and will always
continue to be
- The major flaw is expansion
- Matter cannot be created so
how then can the universe
be expanding?
- Matter cannot be created so
how then can the universe
be expanding?
- The theory that everything was
always here and will always
continue to be
- The Big Bang Theory
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