Is Pluto's Visible Light Intensity Equal to Earth's?

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Pluto's visible light intensity is not equivalent to Earth's due to the inverse square law, which states that light intensity decreases with distance from the source. Although lux is a consistent unit of measurement, the actual light intensity on Pluto is significantly lower than on Earth. This reduction in intensity occurs because light spreads out as it travels through space. Images of distant objects often require longer exposures to capture the faint light available. Therefore, while lux remains constant, the effective light intensity on Pluto is much weaker than on Earth.
Hobart
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Is the visible light on the surface of Pluto equivalent in intensity to what it is on Earth? That is, is 1 lux = 1 lux even though it takes light that much longer to get there from the sun? Or are images of distant objects in the solar system taken with longer exposures?
 
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No, light intensity drops off as a square function of distance.
 
Lux is a unit of measurement. It doesn't change just by moving from the Earth to Pluto. However, the intensity of light does indeed drop off with distance from the Sun. Not because light has been traveling longer, but because it spreads out as it travels.
 

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