Payal Priya
Birsa Institute of Technology (BIT), Sindri
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## < 9 Other formulas that you can solve using the same Inputs

Path difference in Young's double-slit experiment
Path Difference=sqrt((Distance from center to the light source+(Distance between two coherent sources/2))^2+(Distance between slits and screen)^2)-sqrt((Distance from center to the light source-(Distance between two coherent sources)^2)+(Distance between slits and screen)^2) GO
Distance from center to a light source for destructive interference in YDSE
Distance from center to the light source=((2*Number-1)*Wavelength*Distance between slits and screen)/(2*Distance between two coherent sources) GO
Distance from center to a light source for constructive interference in YDSE
Distance from center to the light source=(Number*Wavelength*Distance between slits and screen)/Distance between two coherent sources GO
Path difference for constructive interference in Young’s double-slit experiment
Path Difference=(Distance between two coherent sources*Distance from center to the light source)/Distance between slits and screen GO
Fringe Width
Fringe Width=(Wavelength*Distance between slits and screen)/Distance between two coherent sources GO
Optical path difference when fringe width is given
Optical path difference=(Refractive Index-1)*Thickness*Fringe Width/Wavelength GO
Path difference in Young's double-slit experiment
Path Difference=Distance between two coherent sources*sin(Theta) GO
Resolving power of a microscope
Resolving power=(2*Refractive Index*sin(Theta))/Wavelength GO
Resolving limit of a microscope
Resolving Limit=Wavelength/(2*Refractive Index*sin(Theta)) GO

## < 1 Other formulas that calculate the same Output

Optical path difference when fringe width is given
Optical path difference=(Refractive Index-1)*Thickness*Fringe Width/Wavelength GO

### Optical path difference Formula

Optical path difference=(Refractive Index-1)*Distance between slits and screen/Distance between two coherent sources
More formulas
Interference of waves of two intensities GO
Intensity of constructive interference GO
Intensity of destructive interference GO
Resultant intensity of coherent sources GO
Path difference in Young's double-slit experiment GO
Path difference in Young's double-slit experiment GO
Fringe Width GO
Path difference for constructive interference in Young’s double-slit experiment GO
Path difference in YDSE when λ is given GO
Distance from center to a light source for constructive interference in YDSE GO
Path difference for minima in Young’s double-slit experiment GO
Path difference for minima in Young’s double-slit experiment GO
Distance from center to a light source for destructive interference in YDSE GO
Distance from center to a light source for destructive interference in YDSE GO
Resultant intensity on-screen of Young's double-slit experiment GO
Resultant intensity on-screen of YDSE when intensities are different GO
Optical path difference when fringe width is given GO
Thin-film destructive interference in reflected light GO
Thin-film constructive interference in reflected light GO
Thin-film constructive interference in transmitted light GO
Thin-film destructive interference in transmitted light GO

## What is optical path difference ?

In the thin glass slab of thickness t and refractive index μ, and the optical path of the ray increases by t( μ -1 ) where t is the thickness of the slab. So path difference between waves coming from two coherent sources at any point P is Δ = (μ - 1 ) D/d = ( μ -1 )t β / λ.

## How to Calculate Optical path difference?

Optical path difference calculator uses Optical path difference=(Refractive Index-1)*Distance between slits and screen/Distance between two coherent sources to calculate the Optical path difference, Optical path difference or optical distance is the product of the geometric length of the path followed by light through a given system, and the refractive index of the medium through which it propagates. . Optical path difference and is denoted by Δ symbol.

How to calculate Optical path difference using this online calculator? To use this online calculator for Optical path difference, enter Refractive Index (RI), Distance between two coherent sources (d) and Distance between slits and screen (D) and hit the calculate button. Here is how the Optical path difference calculation can be explained with given input values -> 0.666 = (1.333-1)*0.2/0.1.

### FAQ

What is Optical path difference?
Optical path difference or optical distance is the product of the geometric length of the path followed by light through a given system, and the refractive index of the medium through which it propagates. and is represented as Δ=(RI-1)*D/d or Optical path difference=(Refractive Index-1)*Distance between slits and screen/Distance between two coherent sources. The refractive index of a medium is defined as how the light travels through that medium. It is a dimensionless measure. It defines how much a light ray can bend when it enters from one medium to the other, Distance between two coherent sources is the length at which both coherent sources are placed.Two sources that vibrate with a fixed phase difference between them are said to be coherent and Distance between slits and screen or photodetector is the large distance at which the slits and screen in Young's double-slit experiment.
How to calculate Optical path difference?
Optical path difference or optical distance is the product of the geometric length of the path followed by light through a given system, and the refractive index of the medium through which it propagates. is calculated using Optical path difference=(Refractive Index-1)*Distance between slits and screen/Distance between two coherent sources. To calculate Optical path difference, you need Refractive Index (RI), Distance between two coherent sources (d) and Distance between slits and screen (D). With our tool, you need to enter the respective value for Refractive Index, Distance between two coherent sources and Distance between slits and screen and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
How many ways are there to calculate Optical path difference?
In this formula, Optical path difference uses Refractive Index, Distance between two coherent sources and Distance between slits and screen. We can use 1 other way(s) to calculate the same, which is/are as follows -
• Optical path difference=(Refractive Index-1)*Thickness*Fringe Width/Wavelength
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