Compton effect

E99416

physical phenomenon quantum effect scattering process

The Compton effect is the increase in wavelength (and corresponding decrease in energy) of X-rays or gamma rays when they scatter off electrons, providing key evidence for the particle nature of light.

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All labels observed (4)

Label	Occurrences
Compton scattering	7
Compton effect canonical	2
Compton scattering formula for photon energy shift	1
Compton wavelength shift	1

Statements (49)

Predicate	Object
instanceOf	physical phenomenon ⓘ quantum effect ⓘ scattering process ⓘ
alsoKnownAs	Compton effect ⓘ surface form: Compton scattering
category	Quantum mechanics ⓘ Radiation physics ⓘ Scattering theory ⓘ
conserves	energy ⓘ momentum ⓘ
contradicts	classical wave theory of light alone ⓘ
dependsOn	scattering angle ⓘ
describes	decrease in energy of X-rays or gamma rays after scattering ⓘ increase in wavelength of X-rays or gamma rays after scattering ⓘ
hasApplicationIn	astrophysics ⓘ gamma-ray spectroscopy ⓘ material analysis ⓘ medical imaging ⓘ radiation therapy ⓘ
hasClassicalLimit	Thomson scattering ⓘ
hasFormulaForShift	Δλ = (h / (m_e c)) (1 − cos θ) ⓘ
hasKeyEquation	λ' − λ = (h / (m_e c)) (1 − cos θ) ⓘ
hasMaximumShiftAt	scattering angle 180 degrees ⓘ
hasQuantity	Compton wavelength ⓘ Compton effect self-linksurface differs ⓘ surface form: Compton wavelength shift
hasSymbol	Δλ ⓘ
involves	electrons ⓘ photons ⓘ
isDescribedIn	quantum electrodynamics ⓘ
isImportantFor	high-energy astrophysical sources ⓘ understanding radiation shielding ⓘ
isTypeOf	inelastic scattering ⓘ
maximumWavelengthShift	2 h / (m_e c) ⓘ
namedAfter	Arthur H. Compton ⓘ surface form: Arthur Holly Compton
occursInRegime	high-energy photons ⓘ
occursMoreStronglyFor	larger scattering angles ⓘ
occursOn	free electrons ⓘ loosely bound electrons ⓘ
occursWith	X-rays ⓘ gamma rays ⓘ
providesEvidenceFor	photon concept ⓘ quantum theory ⓘ
relatedTo	Klein–Nishina formula ⓘ Thomson scattering ⓘ photoelectric effect ⓘ
shows	particle nature of light ⓘ
usedTo	calibrate high-energy photon detectors ⓘ measure electron momentum distributions ⓘ
wasExplainedBy	Arthur H. Compton ⓘ surface form: Arthur Holly Compton
yearExplained	1923 ⓘ

How these facts were elicited

The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.

Instruction

You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10.

# Requirements
- If you don't know the subject at all, return an empty list.
- If the subject is not a named entity, return an empty list.
- Include at least one triple where predicate is "instanceOf".
- Do not get too wordy.
- Separate several objects into multiple triples with one object.

Input

Subject: Compton effect
Description of subject: The Compton effect is the increase in wavelength (and corresponding decrease in energy) of X-rays or gamma rays when they scatter off electrons, providing key evidence for the particle nature of light.