Preview (5 of 15 cards)
What is the laws of refraction?
Snell's law: n₁sinθ₁ = n₂sinθ₂; incident ray, refracted ray, and normal are in same plane
What is refractive index?
Ratio of speed of light in vacuum to speed of light in medium — n = c/v
What is a convex lens?
A lens that is thicker at centre — converges light rays — used in magnifying glass, camera
What is a concave lens?
A lens that is thinner at centre — diverges light rays — used to correct short sight
What is the power of a lens?
Reciprocal of focal length in metres — P = 1/f — measured in dioptres (D)
🔒 10 more cards — clone this deck to access all cards