State and explain the laws of reflection of light at a plane surface (like a plane), with the help of a labeled ray-diagram. Mark the angles of ‘incidence’ and ‘reflection’ clearly on the diagram. If the angle of reflection is 47.5°, what will be the angle of incidence?

Laws of reflection of light states that:


First law of reflection: The incidence ray, the reflected ray and the normal (at the point of incidence), all lie in the same plane.


For e.g. in the figure, the incident ray, the reflected ray and the normal, all lie in the same plane, the plane of paper.


Second law of reflection: The angle of reflection is always equal to the angle of incidence.


For e.g.


If angle of reflection is 45°, then the angle of incidence will also be 45°.


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