Light from a laser strikes a plane mirror at an angle of 38𝑜38 o to the normal. If the laser is moved so that the angle of incidence increases by 13𝑜13 o , what is the new angle of reflection in degrees?
Question
Light from a laser strikes a plane mirror at an angle of 38𝑜38 o to the normal. If the laser is moved so that the angle of incidence increases by 13𝑜13 o , what is the new angle of reflection in degrees?
Solution
The law of reflection states that the angle of incidence is equal to the angle of reflection.
Step 1: Determine the initial angle of reflection. Since the angle of incidence is equal to the angle of reflection, the initial angle of reflection is also 38 degrees.
Step 2: Determine the new angle of incidence. If the laser is moved so that the angle of incidence increases by 13 degrees, the new angle of incidence is 38 degrees + 13 degrees = 51 degrees.
Step 3: Determine the new angle of reflection. According to the law of reflection, the new angle of reflection is also 51 degrees.
So, the new angle of reflection is 51 degrees.
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