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First of all we take a chart paper or stiff paper. Let the sheet project a little beyond the edge of the table.

Perform activity again. This time use a sheet of stiff paper or a chart paper. Let the sheet project a little beyond the edge of the Table.
Cut the projecting portion of the sheet in the middle. Look at the reflected ray. Make sure that the reflected ray extends to the projected portion of the paper. Bend that part of the projected portion on which the reflected ray falls. Bring the paper back to the original position. When the whole sheet of paper is spread on the table, it represents one plane. The incident ray, the normal at the point of incidence and the reflected ray are all in the plane when you bend the paper you create a plane different from the plane in which the incident ray and the normal lie. They do not see the reflected ray. What does it indicate? It indicates that the incident ray, the normal at the point of incidence and the reflected ray all lie in the same plane. This is another law of reflection.
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आंकड़ों का प्रबंधन गणित की एक शाखा के अंतर्गत आता है जिसे सांख्यिकी कहा जाता है । सांख्यिकी कुछ आंकड़ों से उपयोगी तथ्यों को खींचने का विज्ञान है। इसमें आंकड़ों से संबंधित कुछ विशिष्ट प्रश्नों के उत्तर खोजने के लिए एक दृश्य के साथ आंकड़ों का व्यवस्थित संग्रह, प्रस्तुति और व्याख्या शामिल है.
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