Polarisation, Malus' law and Brewster angle
Unpolarised light through two polaroids: I = I₀ cos²θ (Malus' law). Add a third polaroid between crossed ones, and reflect light off glass to find Brewster's angle tanθ_B = n.
About this experiment
| Subject | Physics |
|---|---|
| Class | 12 |
| Chapter | 10. Wave Optics |
| NCERT section | 10.6 |
| Level | NCERT level |
| Time | about 12 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: polarisation · Malus' law · Brewster angle · polaroid · transverse waves
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
- Resolving power and the Rayleigh criterion
- Single slit diffraction
- Thin film interference: soap film, oil film and anti-reflection coating
- Young's double slit experiment