What is the Newtion Ring Experiment?

[kenok1216]

Homework Statement

refractive index of prism=1.45
λ=450nm
50 bright ring are observed
find d

Homework Equations

2d=nλ/2

The Attempt at a Solution

since 50 bright rings are observed n=24 (-24---------0-------------24)
if the distance travel=λ/2 constructive interference will happen
since the ray1 reflected by prism(n=1.45--->n=1 air)no phase shift
by ray 2 air to flat plate have phase shift
2d=24(λ/2) and λ=450nm/n=450nm/1.45=310nm
d=[310nm(24)]/4=1.86x10^-6m but the answer=1.11x10^5m why? [/B]

 

[drvrm]

Homework Equations

2d=nλ/2

i think
for constructive interference -draw a diagram of the rays interfering at thickness d
the correct condition perhaps is
path difference = n. wavelength (in phase)
and path difference =2.d + (wavelength / 2)
check from your textbook

 

[kenok1216]

i think
for constructive interference -draw a diagram of the rays interfering at thickness d
the correct condition perhaps is
path difference = n. wavelength (in phase)
and path difference =2.d + (wavelength / 2)
check from your textbook

so do you mean nλ=2d+

i think
for constructive interference -draw a diagram of the rays interfering at thickness d
the correct condition perhaps is
path difference = n. wavelength (in phase)
and path difference =2.d + (wavelength / 2)
check from your textbook

why pd=2d+λ/2?

 

[drvrm]

so do you mean nλ=2d+

why pd=2d+λ/2?

draw the ray diagram for interference