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.