Answer
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Hint: The answer to the above question lies in the question itself. In the question it is given to us that the ray is reflected in turn by three plain mirrors mutually at right angles to each other. There is no need to draw the diagram nor any calculation involved in the above question. It is just the case of understanding the direction of light which is reflected by the above system of mirrors.
Complete step-by-step solution:
In the question we are given three plane mirrors which are mutually perpendicular to each other. After some reflection of the incident ray from the above system, it is given to us that the ray is reflected in turn by three plain mirrors. The meaning of this statement basically means that the incident ray and the reflected ray are in the same sense but in opposite directions. More precisely the incident ray and the reflected ray are in opposite directions with respect to each other.
Since the rays of light are opposite to each other, we can say the angle between the incident and the reflected ray is 180 degrees.
Given figure below consists of three plane mirrors M(1), M(2) and M(3) which are mutually perpendicular to each other. The incident ray is denoted by ‘i’ and the reflected ray by ‘r’.
The above figure is one among the many possible outcomes, by which the above scenario can be explained.
Note: When two rays travel along the same path or parallel paths irrespective of their direction, we say the two rays travel in the same sense. It is also to be noted that in the above problem, we cannot say the ray got reflected just three times or how many times as we wish to consider it. There can be finitely many examples where in the above system of plane mirrors the incident ray is in the opposite direction of itself.
Complete step-by-step solution:
In the question we are given three plane mirrors which are mutually perpendicular to each other. After some reflection of the incident ray from the above system, it is given to us that the ray is reflected in turn by three plain mirrors. The meaning of this statement basically means that the incident ray and the reflected ray are in the same sense but in opposite directions. More precisely the incident ray and the reflected ray are in opposite directions with respect to each other.
Since the rays of light are opposite to each other, we can say the angle between the incident and the reflected ray is 180 degrees.
Given figure below consists of three plane mirrors M(1), M(2) and M(3) which are mutually perpendicular to each other. The incident ray is denoted by ‘i’ and the reflected ray by ‘r’.
The above figure is one among the many possible outcomes, by which the above scenario can be explained.
Note: When two rays travel along the same path or parallel paths irrespective of their direction, we say the two rays travel in the same sense. It is also to be noted that in the above problem, we cannot say the ray got reflected just three times or how many times as we wish to consider it. There can be finitely many examples where in the above system of plane mirrors the incident ray is in the opposite direction of itself.
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