ⓟⓛⓔⓐⓢⓔ ⓗⓔⓛⓟ ⓜⓔ ⓕⓐⓢⓣ ⓟⓛⓔⓐⓢⓔⓔⓔⓔⓔⓔ
subject - physics
lesson name - light energy
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speed of light 3lakh km per s
Light is a form of energy
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1. energy, vision
2. 3 × 10⁸ m/sec
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