sun rays are incident at angle 24° with the horizon .how can they be directed parallel to the horizon using plane mirror?
Answers
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Answer:
The mirror must be placed at an angle of 78 degrees with the normal or 12 degrees with the horizontal.
Explanation:
The rays of Sun be incident at 24 degrees with respect to horizon, to make them parallel to the horizon by plane mirror will need inclination of the plane mirror at an angle which can be calculated as follows -
Given, Angle of incidence of the ray of Sun = 24 degree with the horizon
As we know that the Angle of incidence = Angle of reflection
Angle of reflection of the ray of Sun = 24 degree with the horizon
Now to make the reflected ray parallel to the horizon, the angle of incidence must be changed in accordance using the plane mirror.
The mirror should be placed at an angle so that the reflected angle must make 90 degree angle to previous normal.
As the 24 degree with horizontal would mean 12 degrees with the normal.
90 – 12 = 78 degree.
Therefore, the mirror must be placed at an angle of 78 degrees with the normal or 12 degrees with the horizontal