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What are the two main categories of waves?
transverse
longitudinal
Which type of wave has oscillations
perpendicular
(at right angles) to the direction of energy transfer?
Transverse ( transverse means across)
Which type of wave has oscillations
parallel
to the direction of energy transfer?
Longitudinal
What do waves transfer from one place to another?
Energy
Are
electromagnetic
(EM) waves transverse or longitudinal?
Transverse
Are
sound
waves transverse or longitudinal?
Longitudinal
Are
mechanical
waves transverse or longitudinal?
They can be either
Which type of electromagnetic (EM) wave travels the fastest through a vacuum?
All EM waves travel at the same speed in a vacuum
Put these EM waves into the correct order (lowest frequency first)
gamma ray, x-ray,radio, infrared, visible, microwave, ultraviolet
radio (lowest frequency)
microwave
infrared
visible
ultraviolet
x-ray
gamma ray
Is the
energy
of a wave proportional to its wavelength
or
its frequency
Frequency
What name is given to the area in a longitudinal wave where the particles have been moved apart?
Rarefaction
What name is given to the area in a longitudinal wave where the particles have been moved closer together?
Compression
What are the three wave phenomena?
reflection
refraction
diffraction
What size does the gap or obstacle need to be if there is to be an appreciable amount of diffraction?
Similar to the wavelength of the wave
Where
does refraction occur?
At the boundary (interface) between two materials
What is the change of direction of waves at an interface between two materials called?
Refraction
What does
represent in the wave equation
The
wavelength
of the wave
Which type of EM wave is used in TV remote controls?
Infrared
Which types of communication devices use microwaves?
Mobile telephones and satellite TV
When constructing ray diagrams, what is the normal?
A line perpendicular (at right angles) to the reflecting (or refracting) surface at the point of incidence.
(It is called a construction line as it is used in determining where to draw rays)
What is the relationship between the
angle of incidence
and the
angle of reflection
?
They are always equal
What 3 properties do images produced in a plane mirror have?
virtual (cannot be projected onto a screen)
upright
laterally inverted (back to front horizontally)
What wave property does the
pitch
of sound relate to?
Frequency
What wave property does the
loudness
of sound relate to?
Amplitude
What are echoes?
Reflected sounds
If a wave source is
moving towards
an observer, what effect does it have on the
observed frequency
of the wave?
It increases (think of the peaks being pushed closer together)
When a wave source moves relative to an observer, the frequency and wavelength seem to change. What is this effect called?
The Doppler effect
What is
Red Shift
?
The phenomenon whereby light from distant galaxies is shifted towards the red end of the spectrum as they are moving away from us
Which is the
only
theory that can explain the existence of Cosmic Microwave Background Radiation (CMBR)
The Big Bang theory
What is the
Big Bang
theory?
A theory about the creation of the Universe that states the Universe began from a very small initial point.
Author
HLHSscience
ID
192924
Card Set
AQA P1.5.txt
Description
AQA P1.5
Updated
2015-02-22T05:32:30Z
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