OSU Ph 212 2nd midterm

n = c/v

• n = optical density (n=>1)
• c = speed of light == 3.00 *10⁸
• v = the apparent spped of light in a material (v<=c)

I = P / A

• I = intensity
• P = power
• A = area

Area = 4πr²

Area of a sphere

Area = 2πr^2

Area of a hemisphere

Area = πr²

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.

= (log_xA) + (log_xB)

= 10^A*10^B == 10^A+B

= Log_x(A) - Log_x(B)

= (10^A)/(10^B) == 10^A-B

= n(log_x(A))

₁₀Aⁿ == 10^A*n

LOOK UP.