@salvabara@mastodon.social

The spectral composition of light is a key factor for understanding its visual and non-visual effects, and for evaluating its ecological impacts. Considerable attention has been paid in the last years to the spectral characteristics of different lighting technologies. The spectrum of the light emitted by a lamp, however, may suffer significant changes along the path from the source to the observer. Some of these changes take place abruptly, for instance in reflections, others in a smoother way,

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Salva Bará @salvabara@mastodon.social

· 14mo ago

Replying to

@georgetakei@universeodon.com Sir Isaac Newton disapproves

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Salva Bará @salvabara@mastodon.social

· 8mo ago

Periodic reminder that any effective policy for light pollution control (not just 'mitigation') unavoidably requires limiting artificial light emissions.

https://arxiv.org/abs/2503.02724

arXiv.org

Trust, but verify: Reducing artificial light emissions and monitoring compliance

In order to reduce light pollution we have to reduce the overall amount of artificial light emissions. This is a consequence of the basic rules governing the propagation of light in the terrestrial environment. In this work I revisit the physical laws causing that (i) "all" artificial light emitted outdoors is lost or pollutant, (ii) the negative effects of light pollution depend monotonically on the local concentration of photons of anthropogenic origin, and (iii) this concentration depends lin

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