Question
A light source appears brighter when it is closer to you, and less bright when it is farther away. Why is that? Explain this phenomenon using ray diagrams
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This phenomenon is due to the inverse square law of light. This law states that the intensity of light is inversely proportional to the square of the distance from the source. This means that the intensity of light decreases as the distance from the source increases.
To explain this phenomenon using ray diagrams, imagine a light source at the center of a circle. Rays of light are emitted from the source in all directions. As the distance from the source increases, the number of rays that reach a given point decreases. This means that the intensity of light at a given point decreases as the distance from the source increases.
To explain this phenomenon using ray diagrams, imagine a light source at the center of a circle. Rays of light are emitted from the source in all directions. As the distance from the source increases, the number of rays that reach a given point decreases. This means that the intensity of light at a given point decreases as the distance from the source increases.