Repeat the experiment by varying the angle of incidence and recording the corresponding angle of reflection. According to Snells Law of reflection, the angle of incidence equals the angle of reflection, and for transmissive media the refracted (transmitted) beams. Angle of reflection equals angle of incidence. Normal - it is the line drawn perpendicular to. Measure the angle of incidence and the angle of reflection.ħ. The marine sextant is a hand - held instrument for measuring the angle between the lines of sight to two. Angle of reflection - the angle formed between the normal and the reflected ray is called angle of reflection. Remove the mirror and the ray box from the paper and join the crosses to track the incident ray and the reflected ray.Ħ. Mark the reflected ray with a cross on the paper using a pencil.ĥ. The light ray falls on the mirror and gets reflected. Using a pencil mark the path of the incident ray with a cross on the paper.Ĥ. What is the value of angle of incidence Given that, angle of incidence + angle of reflection 60. If the reflecting surface is a very smooth. The incident ray, the normal to the mirror at the point of incidence and the reflected ray, all lie in the same plane. Draw a line perpendicular to the reflecting surface of the mirror and mark it as the normal.Ģ. Place the light source (light ray box) away from the plane mirror, facing its reflecting surface as shown in the image.ģ. Shine the ray of light at the point where the normal meets the plane of the mirror. The angle between incident ray and reflected ray is 60. The angle of incidence (measured from the normal line) is equal to the angle of reflection (also measured from the normal line) and, ii. The experimental set up requires a light source (light ray box), a reflecting surface (plane mirror), a ruler, a protractor (to measure angles), an A4 size paper and marking pencils.ġ. Place the A4 paper on a leveled surface, draw a line along the long edge and fix a plane mirror upright on it. The angle of reflection can be experimentally measured.
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