superposition

Question 1

state the principle of superposition

Answer 1

when 2 or more waves meet at a point the resultant displacement a equals to the sum of individual displacement

Question 2

double slit interference equation

Answer 2

λ = ax/D
λ=wavelength
a=slit separation
x=fringe separation
D=reflecting wall from diffraction wall

Question 3

distance btw 2 nodes equals to

Answer 3

wavelength/2

Question 4

define diffraciton

Answer 4

the spreading of waves after passing through an aperture or around objects

Question 5

define interference

Answer 5

waves overlap and their resultant displacement is the sum of the displacement of each wave

Question 6

define coherent

Answer 6

waves with constant phase difference

Question 7

what are phase difference

Answer 7

phase difference measure in radian
inphase=0 or 2π
antiphase = π

Question 8

how to find path difference with phase difference

Answer 8

phase difference times wavelength

Question 9

conditions for young’s double slit experiment

Answer 9

1. coherent waves
2. from single light source

Question 10

equation diffraction grating

Answer 10

d * sin θ = n λ
θ=angle from zero order
d=grating seperation
n=order
λ=wavelength

Question 11

what is the max angle of diffraction grating

Answer 11

90 from 0 order