waves

Question 1

description of waves

Answer 1

transfer energy and information without transferring matter

Question 2

transverse waves

Answer 2

have peaks and troughs
vibrations at right angle
example, light

Question 3

what waves have peaks and troughs?

Answer 3

transverse waves

Question 4

light is a what type of wave?

Answer 4

transverse

Question 5

longitudinal waves

Answer 5

• consist of compressions (particles pushed together) and rarefactions (particles moved apart)
• vibrations in same direction as direction of travel
  example, sound

Question 6

vibrations are in same direction as direction of travel is what type of wave?

Answer 6

longitudinal wave

Question 7

sounds are what type of waves?

Answer 7

longitudinal waves

Question 8

what is a amplitude

Answer 8

distance from equilibrium to maximum displacement

Question 9

distance from equilibrium to maximum displacement is called what?

Answer 9

amplitude

Question 10

wavefront

Answer 10

lining joining points on wave at same point

Question 11

lining joining points on a wave at same point

Answer 11

wavefront

Question 12

frequency

Answer 12

number of waves that pass a single point per second

Question 13

number of waves that pass a single point per second

Answer 13

frequency

Question 14

wavelength

Answer 14

distance between a point on one wave and same point on next wave

Question 15

distance between a point on one wave and same point on next

Answer 15

wavelength

Question 16

time period

Answer 16

time taken for one complete wave to pass

Question 17

time take for one complete wave to pass

Answer 17

time period

Question 18

speed of wave is equal to

Answer 18

product of the frequency and wavelength

Question 19

calculation of wave is equal to product of frequency and wavelength

Answer 19

speed = frequency x wavelength

Question 20

angle of incidence =

Answer 20

angle of reflection

Question 21

frequency, wavelength and speed are all …… in reflections

Answer 21

unchanged

Question 22

if waves enter less dense medium

Answer 22

speed increases and it bends away

Question 23

electromagnetic waves (RMIVUXG)

Answer 23

radio waves
microwaves
infrared radiation
visible light
ultraviolet
x-ray
gamma radiation

Question 24

radio waves

Answer 24

have long wavelength and reflected by a layer of atmosphere

Question 25

microwave

Answer 25

greater frequency, shorter wavelength

Question 26

infrared

Answer 26

night vision equipment

Question 27

visible light

Answer 27

fibre optics

Question 28

ultra violet

Answer 28

fluorescent lamps

Question 29

x-ray

Answer 29

penetrate material easily

Question 30

gamma radiation

Answer 30

sterilising food and medical equipment . high energy

Question 31

hazards of electromagnetic spectrum

Answer 31

• internal heating
• skin burns
• skin cancer
• mutations
• exposure

Question 32

Snell’s law

Answer 32

relates angle of incidence and angle of refraction to the refractive index

Question 33

optical fibre

Answer 33

long thin rod of glass