Thin-film interference
Reflections from front/back of a film interfere; extra path 2d vs λ/n sets bright/dark at a given thickness.
OpticsSnell’s law, TIR, interference and diffraction.
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Thin-film interference
Thin film interference: colorful fringes from reflected waves. This “Thin-film interference” page is an MVP interactive sketch — formulas, controls, and live readouts in the browser; a fuller bench may follow.
Thin film interference: colorful fringes from reflected waves.
Key formulas
2nd\cos\theta=m\lambda
How to use
- Adjust parameters in the left panel.
- Use play / pause and speed controls.
- Match right-side readouts to the formulas.
- Reset to return to the initial state.
Applications
- Thin-film interference: Thin film interference: colorful fringes from reflected waves.
- Classroom focus: extra path 2d vs λ/n sets bright/dark at a given thickness.
FAQ
What does MVP mean on this page?
An interactive sketch with formulas and parameters. Polished Ready labs are the full bench experience.
What does the “Thin-film interference” lab practice?
Tune parameters and match readouts to the “Thin-film interference” relations — useful for prep and demos.
Real vs virtual image?
Real images can form on a screen; virtual ones cannot — view by eye along rays.
How do I remember Snell’s law?
n₁sinθ₁ = n₂sinθ₂; denser medium → smaller angle to the normal.