Basic Reflection of a Ray

• Construct a normal N at the point of incidence of the given ray.
• Measure and label the angle of incidence i.

be sure to measure from the normal.

here i is measured at 39°

• State the angle of reflection r.

here r is drawn at 39°

• Construct the reflected ray and then label the angle of reflection r.

 

the completed ray diagram.

 

Example
Can you spot what is wrong with the following ray diagrams? (a) (b) (c)

 

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