Physics Edexcel Glossary/key terms

HideShow resource information
  • Created by: Emma
  • Created on: 07-11-12 12:13
Alternating current ( a.c)
A current that repeatedly changes direction
1 of 30
Meter used in an electric circuit for measuring current
2 of 30
amperes (amps)
units used to measure electrical current
3 of 30
maximum displacement of a wave measured from the mean postion
4 of 30
the layer of gases surrounding a planet
5 of 30
Big Bang
an explosion some 14 billion years ago that created both space and time.
6 of 30
Big Bang theory
a theory that proposes the creation of the universe from the Big Bamg
7 of 30
black drawf
the final stage of a white dwarf, when it has lost all its energy
8 of 30
black hole
an extremely dense core of a supermassive star left behind after the supernova stage; light cannot escape its strong gravitational pull
9 of 30
regions where particles are pushed together and create a region of higher pressure in a sound wave.
10 of 30
converging lens
a lens that focuses parallel rays of light to a point
11 of 30
cosmic mircowave background(CMB) radiation
the 'left-over' radiation from the Big Bang- radiation coming very faintly form all directions in space
12 of 30
the spreading of a wave at an opening
13 of 30
direct current
an electric current that flows in one direction only
14 of 30
diverging lens
a lens that makes parallel rays of light spread out rather than focus to a point
15 of 30
doppler effect
the change in the wavelength or frequency of a wave as a result of relative motion between the source and observer
16 of 30
a technique similar to sonar used by some animals to navigate and find their prey
17 of 30
the proportion of input energy that is transferred to useful form, calculated using equation: efficiency = (useful energy transferred by the device/ total energy supplied to the device) x 100%
18 of 30
elastic potential energy
energy from the flow of electrons through q circuit(eg devices with plugs of batteries use electrical energy)
19 of 30
electrical power
the rate of energy transfer
20 of 30
electrochemical cell
a device for converting chemical energy into electrical energy, consisting of a container, electrodes and and electrolyte
21 of 30
electromagnetic spectrum
electromagnetic waves ordered according to wavelength and frequency, ranging from low frequency radio waves to high frequency gamma rays
22 of 30
electromagnetic waves
a group of transverse waves that carry different amounts of energy, ranging from radio waves to gamma rays- the can travel through a vacuum at 300 million m/s
23 of 30
eye piece
the end of a telescope you look through
24 of 30
when materials emit intense visible light upon exposure to ultraviolet
25 of 30
focal length
the distance between the center of the lens and the focal point
26 of 30
force of gravity
an attractive force between all parti
27 of 30
the number of vibrations per second or number of complete waves passing a set point per second
28 of 30
a collection of billions of stars held together by the force of gravity
29 of 30
a device used for producing electrical energy by moving wires through a magnetic field
30 of 30

Other cards in this set

Card 2


Meter used in an electric circuit for measuring current



Card 3


units used to measure electrical current


Preview of the back of card 3

Card 4


maximum displacement of a wave measured from the mean postion


Preview of the back of card 4

Card 5


the layer of gases surrounding a planet


Preview of the back of card 5
View more cards





Similar Science resources:

See all Science resources »See all Physics resources »