Upon Reflection,light Undergoes a 180 $\degree$ Phase Change:
A)always

question 34

Multiple Choice

Upon reflection,light undergoes a 180 $\degree$ phase change:

• A)always.
• B)if the incident medium has the higher index of refraction.
• C)if the incident medium has the lower index of refraction.
• D)whenever the incident angle is less than the critical angle.