QQuestionPhysics
QuestionPhysics
The brightness of a light is determined by:
Air temperature
Intensity of light waves
Wavelength
Wave speed
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Answer
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Step 1
First, let's identify the factors that determine the brightness of a light. The brightness of a light is affected by the intensity of light waves and the wavelength of light. Air temperature and wave speed do not directly affect the brightness of a light.
Step 2
I = \frac{P}{A}
Intensity of light waves is the power per unit area of electromagnetic radiation. In other words, it measures the amount of energy carried by light waves. A higher intensity corresponds to a brighter light. We can represent intensity (I) using the formula: where P is the power of the light source and A is the cross-sectional area of the beam.
Final Answer
Brightness of a light = f(Intensity of light waves, Wavelength)
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