Refraction, Snell's law, critical angle and total internal reflection
A laser beam crosses boundaries between air, water, glass and diamond. Measure angles, verify n₁ sinθ₁ = n₂ sinθ₂, find the critical angle and watch total internal reflection; includes a slab shift and apparent depth.
About this experiment
| Subject | Physics |
|---|---|
| Class | 12 |
| Chapter | 9. Ray Optics and Optical Instruments |
| NCERT section | 9.3, 9.4 |
| Level | NEET 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: refraction · Snell · critical angle · TIR · refractive index
More from this chapter
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- Focal length of a concave lens (lens-combination method)
- Human eye and its defects (myopia, hypermetropia)
- Convex and concave lenses, lens maker's formula
- Compound microscope and telescopes
- Concave and convex mirrors: image formation
- Optical fibre: acceptance angle, numerical aperture and dispersion
- Prism: deviation curve and dispersion