Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Influence of Earth's Curvature and Atmospheric Refraction on Leveling01:26

Influence of Earth's Curvature and Atmospheric Refraction on Leveling

During leveling, the Earth's curvature and atmospheric refraction introduce deviations in the line of sight from a true horizontal reference. When the line of sight is leveled, it remains perpendicular to the plumb line only at a single point. Beyond this, it deviates due to the Earth’s curvature, represented by the correction C. For a sight distance D, the deviation can be derived using the relationship:This relationship shows that the deviation increases quadratically with distance. Over a...
Flame Photometry: Overview01:02

Flame Photometry: Overview

Flame photometry, also known as flame emission spectrometry, is a technique used for the qualitative and quantitative analysis of elements present in a sample using a flame as the source of excitation energy. The concept of flame photometry was realized in the early 1860s by Kirchhoff and Bunsen, who discovered that specific elements emit characteristic radiation when excited in flames. The first instrument developed for this purpose was used to measure sodium (Na) in plant ash using a Bunsen...
Flame Photometry: Lab01:16

Flame Photometry: Lab

In a flame photometer, when a solution like potassium chloride is aspirated into the flame, the solvent evaporates, leaving behind dehydrated salt. This salt dissociates into free gaseous atoms in their ground state. Some of these atoms absorb energy from the flame, leading to their excitation. The excited atoms return to the ground state, emitting photons at characteristic wavelengths. Because only electronic transitions are involved, the resulting emission lines are very narrow. The intensity...
Light Acquisition02:16

Light Acquisition

In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category, whereas...
Sight Distance in a Vertical Curve01:29

Sight Distance in a Vertical Curve

Sight distance on vertical curves is critical in roadway design. It ensures drivers can see far enough ahead to identify and respond to hazards effectively. This directly impacts safety, driver comfort, and the overall efficiency of the transportation network.Vertical curves are classified into crest and sag curves based on their geometry. For crest curves, sight distance is determined by the line of sight between a driver's eye and a small object on the road's surface. Design parameters for...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

An all-sky light pollution model for global-scale applications that embraces a full range of cloud distributions.

Proceedings of the National Academy of Sciences of the United States of America·2025
Same author

Measuring and monitoring light pollution: Current approaches and challenges.

Science (New York, N.Y.)·2023
Same author

Aerosol impact on light pollution in cities and their environment.

Journal of environmental management·2023
Same author

Light pollution as a factor in breast and prostate cancer.

The Science of the total environment·2021
Same author

Air pollution mitigation can reduce the brightness of the night sky in and near cities.

Scientific reports·2021
Same author

Night-sky radiometry can revolutionize the characterization of light-pollution sources globally.

Proceedings of the National Academy of Sciences of the United States of America·2019

Related Experiment Video

Updated: Jul 14, 2026

Surface Mapping of Earth-like Exoplanets using Single Point Light Curves
06:48

Surface Mapping of Earth-like Exoplanets using Single Point Light Curves

Published on: May 10, 2020

Light-pollution model for cloudy and cloudless night skies with ground-based light sources.

Miroslav Kocifaj1

  • 1ICA SAS, Slovak Academyof Sciences, Dúbravská cesta 9, 845 03 Bratislava, Slovak Republic. kocifaj@savba.sk

Applied Optics
|May 22, 2007
PubMed
Summary

A new scalable theoretical model simulates ground-based light pollution, accurately predicting sky radiance and luminance. This tool aids illuminating engineers and astronomers in analyzing light pollution scenarios.

More Related Videos

An Experimental Approach to Investigating Effects of Artificial Light at Night on Free-Ranging Animals: Implementation, Results, and Directions for Future Research
06:16

An Experimental Approach to Investigating Effects of Artificial Light at Night on Free-Ranging Animals: Implementation, Results, and Directions for Future Research

Published on: February 2, 2022

Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface
06:14

Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface

Published on: July 30, 2020

Related Experiment Videos

Last Updated: Jul 14, 2026

Surface Mapping of Earth-like Exoplanets using Single Point Light Curves
06:48

Surface Mapping of Earth-like Exoplanets using Single Point Light Curves

Published on: May 10, 2020

An Experimental Approach to Investigating Effects of Artificial Light at Night on Free-Ranging Animals: Implementation, Results, and Directions for Future Research
06:16

An Experimental Approach to Investigating Effects of Artificial Light at Night on Free-Ranging Animals: Implementation, Results, and Directions for Future Research

Published on: February 2, 2022

Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface
06:14

Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface

Published on: July 30, 2020

Area of Science:

  • Environmental Science
  • Atmospheric Physics
  • Optical Engineering

Background:

  • Light pollution from ground sources is a growing concern affecting astronomical observations and ecological systems.
  • Existing models often rely on simplified point-source approximations, limiting their accuracy for real-world scenarios.

Purpose of the Study:

  • To present a scalable theoretical model for simulating light pollution from ground sources.
  • To accurately predict the angular behavior of spectral and integral sky radiance and luminance.
  • To provide a flexible tool for analyzing diverse light pollution situations.

Main Methods:

  • Developed a model applicable to finite-dimensional surface sources with defined spectral and angular properties.
  • Incorporated atmospheric effects using aerosol and molecular optical properties.
  • Included cloud layer parameters (altitude, spectral reflectance) for simulating various weather conditions.

Main Results:

  • The model successfully simulates the angular behavior of sky radiance and luminance.
  • It allows for configurable numbers, spatial distributions, distances, and azimuth angles of light sources.
  • The model is computationally efficient, enabling real-time calculations.

Conclusions:

  • The presented theoretical model offers a significant advancement in light pollution simulation.
  • Its parametric nature and real-time computation make it a valuable tool for professionals.
  • The model enhances the study and mitigation of light pollution effects.