Refraction Of Lightray Optics And Optical Instruments
Key Concepts - Refraction of Light
-
Refraction of Light:
- Light waves change direction when passing from one medium to another.
-
Refractive Index:
- Ratio of light speed in vacuum to light speed in a medium.
-
Snell’s Law:
- Sine of the angle of incidence = refractive index ratio x sine of the angle of refraction.
-
Total Internal Reflection:
- Occurs when light strikes a medium with a lower refractive index at a large enough angle.
-
Lenses:
- Optical devices that use refraction to converge or diverge light waves.
-
Lens Types:
- Convex (converging) and concave (diverging).
-
Focal Length:
- Distance from a lens to the point of convergence or divergence.
-
Magnifying Power:
- Ratio of image size to object size.
-
Optical Instruments:
- Telescopes, microscopes, cameras, and more.
