Trigonometry Review

1
Trigonometry Review

• Sin? opp/hyp o/h
• Cos? adj/hyp a/h
• Tan? opp/adj o/a

q
r
s
2
n1sin?1 n2sin?2 (Snells Law)
3

• A ray of light strikes a block of glass at an
  angle of 20 degrees to the normal. What is the
  angle between the normal and the
• Reflected part of the ray?
• What is the sine of the angle between the normal
  and the refracted part of the ray?
• What is the angle between the normal and the
  refracted part of the ray?
• The index of refraction for air is about 1 and
  the index of refraction for glass is about 1.5