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Light Intensity and Distance

tipo de documento Fisika - Esperimentua/Praktika

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Light, a form of electromagnetic radiation, travels in waves. The range of the electromagnetic spectrum we can see is called visible light.Light intensity is a measure of the average power associated with waves, and is generally measured as the power per unit area. The more the light waves spread out, the less intense the light.We perceive relative intensity as brightness. Brighter light corresponds to higher intensity. In this lab, you will assume the power output of either the flashlight or the laser pointer is constant for a given trial.A flashlight uses reflective to spread out light to larger areas.A laser, which is an acronym for "light amplification by stimulated emission of radiation," emits a more focused beam of light.Power output is also related to the life of the battery in a device. How do you think this change over time?

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