# OSU Ph 212 2nd midterm

 The index of refraction n = c/v n = optical density (n=>1)c = speed of light == 3.00 *108v = the apparent spped of light in a material (v<=c) Intensity Intensity is the power contained within the wave divided by the surface over the wave moves power tells you the most information I = P / A I = intensityP = powerA = area intensity expands in all directions Area is Area = 4πr2 Area of a sphere Intensity Expands in one direction Area is Area = 2πr^2 Area of a hemisphere Intensity Doesn't expandes Area is Area = πr2 Inverse Square Law is any physical law stating that some physical quantity or strength is inversely proportional to the square of the distance from the source of that physical quantity. Logx (A*B) = = (logxA) + (logxB) = 10A*10B == 10A+B Logx(A/B) = = Logx(A) - Logx(B) = (10A)/(10B) == 10A-B Logx(An) = = n(logx(A)) 10An == 10A*n Change in base log LOOK UP. AuthorRayen ID46566 Card SetOSU Ph 212 2nd midterm Description2nd midterm information Updated2010-11-01T21:54:08Z Show Answers