opacity
Let an agent handle opacity by radiation type, measurement and applications in materials, astronomy and medical imaging.
Bundle → Layer → Finding → Questions Filled
4 bundles · 8 layers · 8 findings · 16 questions
Property What it is.
Wavelength
Radiation type.
Wavelength
Wavelength dependence.
- Is the material opaque at this wavelength? boundary
- Why does it depend on wavelength? definition
Measure
Optical density.
Measure
Measurement.
- What is its optical density or opacity value? measurement
- Which method was used? provenance
Imaging Radiopacity.
Radiopaque
Contrast agents.
Radiopaque
Radiopacity.
- Why do bones and contrast agents appear bright on X-rays? definition
- Which materials are radiopaque? definition
Reports
Findings.
Reports
Imaging reports.
- Is the user asking the agent to interpret an opacity on their scan? boundary
- How should they discuss it with a clinician? action
Astronomy Stars and atmospheres.
Stars
Stellar opacity.
Stars
Stellar opacity.
- How does opacity affect energy transport in stars? definition
- Which sources explain it? provenance
Atmosphere
Windows.
Atmosphere
Atmospheric opacity.
- Which wavelengths does Earth atmosphere block? definition
- Why do some telescopes go to space? definition
Design Materials and graphics.
Materials
Paper and films.
Materials
Material opacity.
- How opaque is this paper or film, and how is it measured? measurement
- Which standard applies? provenance
Graphics
Alpha.
Graphics
Graphics opacity.
- Is opacity in design software meant? boundary
- Which entry fits? action
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- noun.phenomenon
- Plane
- PHY
- Domain
- PHY.FLW
- Facets: substance
- energy
- Facets: origin
- natural
- Facets: agency
- inert
- Facets: mobility
- not-applicable
- Facets: scale
- not-applicable
- Facets: affordances
- observable
- Other names and narrower kinds
- optical opacity, radiopacity, radio-opacity
What it is Filled
The property of not permitting the passage of electromagnetic radiation such as light, X-rays or radio waves; the opposite of transparency, quantified by opacity or optical depth, and including radiopacity in medical imaging.
Why it exists Filled
Let an agent handle opacity by radiation type, measurement and applications in materials, astronomy and medical imaging.
Distinguishing features Filled
- Blocks radiation
- Depends on wavelength
- Quantified as optical depth
- Used in imaging and astrophysics
What robots and AI may and may not do Filled
Must not
- Use opacity measurements to misrepresent emissions or air quality.
- Claim a material shields people from radiation when its opacity at that wavelength is not established.
- Use radiopacity to conceal items from lawful security screening.
Only with a human decision
- Approving shielding or protective materials for medical or radiation work.
May
- Explain opacity and optical depth for light, X-rays and radio waves.
- Report measured opacity of materials, smoke or the atmosphere with its method.
Moral aspects Filled
- Shielding decisions affect the radiation dose that workers and patients receive.
- Smoke opacity readings enforce air quality rules that protect health.
Who is affected
- Radiation workers and patients
- People breathing polluted air
- Researchers
Owners Filled
Steward
Nobody owns a physical property; it is held in common.
Links to other meta-models Filled
parent
- oewn-11439518-n - registry parent class
related
- optical property - category
- transparency - opposite
- radiography - application
- absorption and scattering - processes
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.opacity
- Open English WordNet: oewn-11510458-n
Direct properties not applicable Not applicable
Not applicable
Opacity is a radiation-dependent property of a material or medium, rather than a physical thing with its own material properties.
Recognition required Filled
- Opaque, translucent, transparent
- Radiopaque markers in X-rays
- Opacity in design software is a related sense
- Materials that block light appear opaque; others appear translucent or transparent.
Capabilities and actions required Filled
- explain opacity and transparency
- measure optical density
- relate radiopacity to imaging
- use opacity in design and astronomy
Hazards and failure modes required Filled
- Confusing opacity with colour
- Misreading imaging opacities without clinicians
Standards and interfaces required Filled
- ISO standards for opacity of paper and films
- Medical device rules for radiopaque markers
Context of use required Filled
- Describing how materials block radiation.
- optical opacity
- radiopacity
- stellar and atmospheric opacity
- opacity in graphics (alpha)
Sources Filled
- Open English WordNet 2024, synset oewn-11510458-n - sense and gloss of the concept
- Wiktionary: opacity - word senses and usage
Open questions
- Should radiopacity be a separate entry?
- How should astronomical opacity be linked?
- How should graphics opacity be split off?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-opacity/spec.json