A light ray strikes a plane mirror at an angle of 30 degrees to the normal. What isthe angle between the incident ray and the reflected ray?A) 30 degreesB) 60 degreesC) 90 degreesD) 120 degrees
Question
A light ray strikes a plane mirror at an angle of 30 degrees to the normal. What isthe angle between the incident ray and the reflected ray?A) 30 degreesB) 60 degreesC) 90 degreesD) 120 degrees
Solution
The law of reflection states that the angle of incidence is equal to the angle of reflection. This means that if a light ray strikes a mirror at an angle of 30 degrees to the normal, it will also reflect off at an angle of 30 degrees to the normal.
However, the question is asking for the angle between the incident ray and the reflected ray. This is not the same as the angle to the normal.
To find the angle between the incident ray and the reflected ray, you would add the angle of incidence (30 degrees) to the angle of reflection (30 degrees), which gives you 60 degrees.
So, the correct answer is B) 60 degrees.
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