Thin film interference: soap film, oil film and anti-reflection coating
Change thickness, angle and film type to see colours of a soap film and why a quarter-wave coating kills reflection.
About this experiment
| Subject | Physics |
|---|---|
| Class | 12 |
| Chapter | 10. Wave Optics |
| NCERT section | 10.4 |
| Level | Advanced (JEE / Olympiad) |
| Time | about 14 minutes |
| Access | Included in a PractiSci plan |
What you do in the lab
Change the controls and watch the physics behave in real time in 3D. Live readouts and graphs show the numbers behind it, and the Learn tab has the theory, procedure, observations and viva questions. Works on a phone or a laptop, in English and Hindi.
Topics: thin film · interference · soap bubble · anti-reflection
More from this chapter
- Diffraction grating: orders, dispersion and resolving power
- Fresnel biprism: fringe width and wavelength
- Huygens' principle: reflection and refraction of wavefronts
- Newton's rings: radius of curvature and wavelength
- Polarisation, Malus' law and Brewster angle
- Resolving power and the Rayleigh criterion
- Single slit diffraction
- Young's double slit experiment