Waves

Question 1

f =

Answer 1

1 / T

Question 2

v =

Answer 2

fλ

Question 3

π radians=

Answer 3

180 degrees

Question 4

define node

Answer 4

No vibrations on stationary wave

Question 5

Define antinode

Answer 5

Vibrations at maximum amplitude

Question 6

fο = (harmonic)

Answer 6

1/(2L) sqrt(Τ/μ)

Question 7

v = (harmonic)

Answer 7

sqrt (Τ/μ)

Question 8

Define coherent

Answer 8

Constant phase difference,
Same FREQUENCY

Question 9

Δd =

Answer 9

λ1 - λ2
If nλ then constructive,
if n+1/2λ then destructive

Question 10

define rarefraction

Answer 10

Reducing density as particles spread apart

Question 11

Define compression

Answer 11

Increase density as particles get closer together to transfer energy

Question 12

Define monochromatic

Answer 12

One colour so contains only ONE WAVELENGTH

Question 13

W = (fringe spacing)

Answer 13

λD / s
When D&raquo_space;s

D = screen and slit distance
s = slit separation

Question 14

tanθ = (diffraction grating)

Answer 14

h / D

h= distance between orders
D = between slits and screen

Question 15

λ = (diffraction grating)

Answer 15

d sinθ / n

d = slit separation
n = number of order (from 0)

Question 16

nλ = (diffraction grating)

Answer 16

nλ =d sinθ

Question 17

d = (diffraction grating)

Answer 17

1/N

N = number of slits per m

Question 18

what property of waves change during diffraction?

Answer 18

AMPLITUDE as energy dissipated

Question 19

violet light

Answer 19

Shortest wavelength so diffracts LESS

Question 20

red light

Answer 20

Longest wavelength so diffracts MORE

Question 21

Define intensity

Answer 21

Brightness of light
Power per unit area

Question 22

n = (diffraction highest maxima)

Answer 22

n = d / λ

n = HIGHEST MAXIMA (integer)
d = slit separation

Question 23

nth order maximum Δd =

Answer 23

nλ

Question 24

Sin θ = (first order diffraction)

Answer 24

λ / d

Question 25

Sin θ = (nth order diffraction)

Answer 25

nλ / d