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