physics practical spring 1

Question 1

what is transferred through waves

Answer 1

energy not particles

Question 2

aptitude of a wave

Answer 2

the maximum displacement of a point on the wave from its undisturbed postion ( on a graph its height )

Question 3

Wavelength

Answer 3

distance between the same point on two adjecent waves

Question 4

Frequency

Answer 4

number of complete waves passing through a certain point per second (mesaured in hertz)

Question 5

Transverse waves

Answer 5

have perpendicular vibrations to the direction which the wave is propagated

Question 6

Longitudinal waves

Answer 6

vibrations are parell to the direction that the wave is propogated

Question 7

Wave speed

Answer 7

speed at which energy is being transferred

Question 8

Equation for wave speed

Answer 8

V= f times lamda(wave lenght)

Question 9

reflection

Answer 9

when a wave bounces back

Question 10

normal

Answer 10

a imagirary line thats perpendicular to the surface at the point of indicence

Question 11

Angle of indecence

Answer 11

the angle between the incoming wave and the normal

Question 12

angle of reflection

Answer 12

the angle between the reflected is the angle between the reflected wave than the normal

Question 13

refraction

Answer 13

is when a wave changes direction when it crosses a boundary between two materials at an angle to the normal this happens because the wave changes speed

Question 14

refractive index

Answer 14

the ratio of the speed of light in a vacum to the peed of light in the material

Question 15

the higher the refractive index

Answer 15

the slower the speed of light

Question 16

critical angle

Answer 16

is the angle of incedence on a boundary that will cause the angle of refraction to be 90 degrees and angle of indedence great than the critical angle will cause total interal refraction

Question 17

diffraction

Answer 17

when a wave spreads out as the bends round obsticles

Question 18

ciritical angle equation

Answer 18

n= 1
sin c

Question 19

converging lenses

Answer 19

bring paralells rays to a focus

Question 20

prinicipal axis

Answer 20

a straight line passing through the middle of the lens

Question 21

principal focus

Answer 21

when rays hitting the lens parallel to the axis all meet

Question 22

three rules for refraction in a converging lens

Answer 22

1 indecent ray parallel to the axis refracts through the lens and passes through the principal focus on the other side(straight until the middle of the lens then go through the dot on the other side)
2 an incident ray passing through the center of the lens carries on in the same direction (go straight through the middle of the lens)
3 an incident ray passing through the principal focus refracts through the lens and travels parallel to the axis.(go through the dot and then go straight when reach middle of lens)

Question 23

diverging lens

Answer 23

makes parallel rays spread out

Question 24

whats a common use of virtual image

Answer 24

magnifying lens

Question 25

white light is made up of

Answer 25

7 diffrent colors

Question 26

triangular prisims

Answer 26

disperse white light

Question 27

monochromatic light

Answer 27

is made up of waves that all have the same frequency

Question 28

frequency and wave length are

Answer 28

inversly proportional

Question 29

How to find speed of sound wave

Answer 29

d/t

Question 30

loudness increases with

Answer 30

amptitude

Question 31

the higher the frequency

Answer 31

the higher the pitch

Question 32

which way does the wave bend when going from dense to less dense

Answer 32

turns away from normal

Question 33

which way does the wave bend when going from less dense to dense

Answer 33

turn toward normal

Question 34

what color light has the highest frequency and shortest wavelength

Answer 34

violet

Question 35

what color has the lowest frequency and longest wavelenght

Answer 35

red

Question 36

what will happen if the angle of incidence is less than the critical angle

Answer 36

most of the wave will be refracted but some will be reflected