waves

Question 1

what do waves transfer

Answer 1

energy without transferring mass

Question 2

what is period and symbol for it

Answer 2

time taken for one wave T

Question 3

what is eqation relating frequency and period

Answer 3

𝑓 = 1/ T

Question 4

equation for speed of wave

Answer 4

v = f x λ

Question 5

high point in wave and lowest point in a wave in maximum displacement

Answer 5

crest trough

Question 6

diff between transverse and longutidan waves

Answer 6

transverse ossilications are up and down and perpendicular to movement
in longitudinal waves oscillations are front and back and parallel to direction of movement

Question 7

eg of transverse wave 3
long 2

Answer 7

electromagnetic waves a s seismic waves water waves
sound and p seismic

Question 8

what happens to speed of wave when going from deep to shallow
from shallow to deep

Answer 8

decreases
increases

Question 9

in diffraction what happens if you increase gap

Answer 9

decrease diffraction

Question 10

in diffraction what happens if you increase wavelength

Answer 10

increase diffraction

Question 11

when light is going through denser medium
less dense medium
where does it bend

Answer 11

towards normal
away from normal

Question 12

what does speed of light in vacuum/
speed of light in medium equal?

Answer 12

refractive index

Question 13

how to n refractive index using sin c critical angle

Answer 13

1/sin c

Question 14

what is critical angle

Answer 14

angle of incidence which makes angle of refraction 90 so makes refracted angle on the surface

Question 15

total internal reflection def

Answer 15

all light rays are reflected in the same more dense medium without any refraction

Question 16

condition of TIR total.. 2

Answer 16

light travels from more dense to less dense
angle of i greater than c

Question 17

what is
principal focus
focal length

Answer 17

the point in which light is brough to by a lens
distance between principal focus and center of lens

Question 18

when object is from infinity image is at … and 3 characteristics
when object at f1 image is at

Answer 18

F it is real inverted and very small
infinity

Question 19

when is image is behind the object and virtual and vertical

Answer 19

in focal length between between f and center of lense

Question 20

what happens to size as the object is getting closer to the lens

Answer 20

gets larger

Question 21

size of object
beyond 2F
at 2f
between 2F F

Answer 21

very small
same size
enlarged

Question 22

what happens to white light when they pass through a prism

Answer 22

they get dispersed into a spectrum

Question 23

colour with
largest frequency
smallest frequency

Answer 23

red
violet

Question 24

uses of microwave 3
infrared
light

Answer 24

bluetooth phone calls wifi
aircon remove control
optical fibre

Question 25

diff between analogue signal and digital

Answer 25

analogue changes frequency and smplitude with time
digital is obly 0 or 1

Question 26

advantages of digital 5 kinda 3 though

Answer 26

can remove unwanted signals (regeneration)
better capacity and quality
can be stored processed by computers

Question 27

how do sound waves travel

Answer 27

by passing on vibration from one particle to the next

Question 28

what are ultrasounds

Answer 28

sound waves with frequency larger than 20kHz

Question 29

uses of echo

Answer 29

radar and echo sounder that measures depth if water under boat
radar uses microwaves noty sound