Physics-(GCSE) Spring Term (Yr.10)

?
what are the properties of waves ?
crests, troughs and frequency
1 of 59
what is a time period to do with waves ?
the time taken for a source to produce one wave
2 of 59
what is the equation for time period and frequency ?
time period: 1 over frequency; frequency: 1 over time period
3 of 59
what is the law of reflection ?
the angle of incidence=the angle of reflection
4 of 59
what's the dotted line in the middle called ? draw a reflection diagram
the normal, draw:
5 of 59
what is specular reflection ?
parallel waves are reflected in s simple direction by smooth surfaces eg. flat mirror/ flat water
6 of 59
what is diffuse reflection ?
parallel waves which are reflected and scattered in lots of different directions by rough surfaces
7 of 59
what is refraction ?
Refraction is the change in direction of wave propagation due to a change in its transmission medium because the speed of the light rays slow down
8 of 59
what is a boundary ?
the point between two different substances
9 of 59
what does absorption ?
when waves are absorbed by the material the wave wants the cross
10 of 59
define reflection
the waves bounce back
11 of 59
define transmission
the waves may be transmitted they can carry on travelling through the new material and then usually refract
12 of 59
what happens when light enters a dense substance ?
it bends towards the normal because it slows down
13 of 59
what happens when light enters a less dense subject ?
it speeds up and bends away from the normal
14 of 59
what is the electromagnetic spectrum ?
its a continuous spectrum of waves which includes the visible spectrum
15 of 59
what properties do all electromagnetic waves have ?
they all transfer energy, they are all transverse, they all travel at the same speed through a vacuum, they can be reflected, refracted and diffracted
16 of 59
what are the 7 types of electromagnetic wave ?
gamma, xray, ultravoilet, visible, infared, microwave, radio
17 of 59
what are the uses for radio waves ?
radio and tv satellites, MRI scanner
18 of 59
what are the uses of microwaves ? what are the dangers ?
satellites for phones tvs and internet, cooking>> can cause the heating and therefore destroying of tissue
19 of 59
what are the uses of visible waves ?
they make fibre optic cables
20 of 59
what are the uses and dangers of UV rays ?
uses- sun tans and lamps>> dangers: damage surface cells and cause skin cancer
21 of 59
what are the uses and dangers of infared rays ?
uses- electric heating>> dangers:none
22 of 59
what are the uses and dangers of X- rays ?
uses- medial screening, radio therapy>>> damage: can cause gene mutation
23 of 59
what are the uses and dangers of gamma rays ?
uses- medical treatment>>> dangers: can cause cancer
24 of 59
what are radio waves emitted and received by ?
emitted from a transmitter and received by a received
25 of 59
how are radio waves produced ?
when an alternating current (oscillating electrons produce oscillating electric and magnetic fields) is connected to an aerial and the radio wave emmited has the same frequency as the alternating current
26 of 59
what are opaque objects ?
objects which dont transmit light
27 of 59
what happens when light waves hit opaque objects ?
they absorb some wave lengths of the light and reflect other ones, the colour depends on which wavelengths of light are most strongly reflected
28 of 59
define transparent objects
objects that transmit light in straight lines so you can see the image clearly, glass
29 of 59
define translucent objects
objects that transmit light but also scatter it so you cant see clearly, frosted glass
30 of 59
draw diagram to show green and blue filter
>>>>>
31 of 59
define the atmosphere
a layer of gases surrounding earth (nitrogen, oxygen, argon, co2)
32 of 59
what holds the gases in the atmosphere ?
gravity from the earth
33 of 59
what is the earths temperature determined by ?
absorption of waves, emission of waves and reflection of the raditation
34 of 59
what happens to most of the outgoing heat from the earth ?
its absorbed by green house gases and re-emitted in all directions
35 of 59
what is the perfect black body of radiation ?
an object which absorbs all types of EM radiation and doesnt reflect or transmit any radiation also it would be the best emitter
36 of 59
what is the radiation caused which is emitted by the perfect black body called ?
black body radiation
37 of 59
what does radiation cause to happen to the earth in day and night ?
the day= the temp goes up, the night= the temp goes down
38 of 59
what is the relationship between the absorption and emit rate with an object and their IR radiation ?
that an object at a constant temperature will emit the same amount of IR as they absorb
39 of 59
what happens with the temperature with the more IR radiation there is ?
it increases
40 of 59
what is a leslie cube ?
a hollow, water tight cube made of metal and the four vertical faces have different surfaces
41 of 59
what are the two types of lens ?
convex lens and concaving lens
42 of 59
where are earthquakes generated from ?
the crust and is generated from its focus
43 of 59
what are the two types of seismic waves ?
primary waves, secondary waves
44 of 59
what is a seismic wave ?
waves which travel through the surface of the earth
45 of 59
what are the characteristics of primary waves ?
they travel faster than s waves, theyre longitudinal, travel through liquids and solids,
46 of 59
what are the characteristics of secondary waves ?
they travel slower than p waves, transverse, only travel through solids, second wave arrives a few minutes later
47 of 59
is ultrasound ionising radiation ?
no
48 of 59
what frequency do ultra sound waves have ?
20,000 Hz or greater
49 of 59
how are ultrasound waves produced ?
by converting electrical osculations into mechanical vibrations
50 of 59
what are uses for ultrasound ?
medical imaging, industrial imaging
51 of 59
what happens to waves at a boundary ?
some waves are reflected and some are transmitted
52 of 59
what is vector addition ?
when 2 similar vectors point in the same direction, so you add them
53 of 59
what is vector subtraction ?
when 2 vectors are going in opposite directions, you subtract them
54 of 59
what does displacement mean ?
distance travelled in a certain direction
55 of 59
27.03.18
000
56 of 59
what is vector subtraction ?
when 2 vectors are going in opposite directions, you subtract them
57 of 59
what does displacement mean ?
distance travelled in a certain direction
58 of 59
27.03.18
000
59 of 59

Other cards in this set

Card 2

Front

what is a time period to do with waves ?

Back

the time taken for a source to produce one wave

Card 3

Front

what is the equation for time period and frequency ?

Back

Preview of the front of card 3

Card 4

Front

what is the law of reflection ?

Back

Preview of the front of card 4

Card 5

Front

what's the dotted line in the middle called ? draw a reflection diagram

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Physics resources:

See all Physics resources »See all Waves resources »