Reflection θ in = θ out Note: always measure θ from the normal line Refraction n 1 sinθ 1 = n 2 sinθ 2 n = c / v =( 3 x 10 8 m / s)/ v
Optics
Reflection θ in = θ out Note: always measure θ from the normal line Refraction n 1 sinθ 1 = n 2 sinθ 2 n = c / v =( 3 x 10 8 m / s)/ v
Index of refraction n is always greater than or equal to 1 When a wave passes from a fast medium to a slow medium it bends“ toward the normal” When a wave passes from a slow medium to a fast medium it bends“ away from the normal”
Total internal reflection: sin θ critical = n 2 / n 1( Note: TIR only occurs if reflected off of“ fast” medium)
Ray tracing for Mirrors( one ray parallel, and one ray into the center)
Ray tracing for Lenses( one ray parallel, and one ray into the center)
Summary