Advanced Science Primary 4 Energy

Jun Jie shines a laser at a mirror at an angle. He notices the reflected beam on the wall. If he moves the laser so the light hits the mirror more steeply (closer to the normal), what happens to the reflected beam?

A It stays in the same position.
B It disappears.
C It moves closer to the normal.
D It moves further from the normal.
Show Worked Solution

Worked Solution

Step 1: Apply the Law of Reflection: Angle of Incidence = Angle of Reflection. Step [2-9]: Moving the laser closer to the normal decreases the angle of incidence. Step [2-9]: Therefore, the angle of reflection must also decrease, moving the reflected beam closer to the normal.

Correct answer: It moves closer to the normal.

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