Complementary experiments: Difference between revisions

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In [[physics]], two experimental techniques are often called '''complementary''' if they investigate the same subject in two different ways such that two different (ideally non-overlapping) properties or aspects can be investigated.<ref>{{Cite journal |last1=Led |first1=Jens J |last2=Gesmar |first2=Henrik |date=1982-10-01 |title=The applicability of the magnetization-transfer NMR technique to determine chemical exchange rates in extreme cases. The importance of complementary experiments |url=https://dx.doi.org/10.1016/0022-2364%2882%2990257-8 |journal=Journal of Magnetic Resonance |language=en |volume=49 |issue=3 |pages=444–463 |doi=10.1016/0022-2364(82)90257-8 |bibcode=1982JMagR..49..444L |issn=0022-2364|url-access=subscription }}</ref><ref>{{Cite journal |last1=Fischer |first1=R. |last2=Dinklage |first2=A. |last3=Knuth |first3=Kevin H. |last4=Caticha |first4=Ariel |last5=Center |first5=Julian L. |last6=Giffin |first6=Adom |last7=Rodríguez |first7=Carlos C. |date=2007 |title=The concept of Integrated Data Analysis of complementary experiments |url=http://aip.scitation.org/doi/abs/10.1063/1.2821262 |journal=AIP Conference Proceedings |language=en |publisher=AIP |volume=954 |pages=195–202 |doi=10.1063/1.2821262|bibcode=2007AIPC..954..195F |hdl=11858/00-001M-0000-0027-09CA-5 |hdl-access=free |url-access=subscription }}</ref> For example, [[X-ray scattering]] and [[neutron scattering]] experiments are often said to be complementary because the former reveals information about the [[electron]] density of the [[atoms]] in the target but gives no information about the [[atomic nucleus|nuclei]] (because they are too small to affect the X-rays significantly), while the latter allows one to investigate the nuclei of the atoms but cannot tell one anything about their electron hulls (because the [[neutron]]s, being neutral, do not interact with the [[electric charge|charged]] electrons).

:''See also [[complement]].''

[[Scattering]] experiments are sometimes also called '''complementary''' when they investigate the same physical property of a system from two [[complementarity (physics)|complementary]] view points in the sense of [[Niels Bohr|Bohr]]. For example, time-resolved and energy-resolved experiments are said to be complementary.<ref>{{Cite journal |last1=Mehta |first1=Halak N. |last2=Benyathiar |first2=Patnarin |last3=Mishra |first3=Dharmendra K. |last4=Varney |first4=Michael |date=2021-07-01 |title=Complementary experiments for parameter estimation in heat transfer model |url=https://www.sciencedirect.com/science/article/pii/S0960308521001000 |journal=Food and Bioproducts Processing |language=en |volume=128 |pages=240–246 |doi=10.1016/j.fbp.2021.06.004 |s2cid=237761703 |issn=0960-3085|doi-access=free }}</ref> The former uses a pulse which is well-defined in time. The latter uses a [[monochromatic]] pulse well defined in energy (its frequency is well known).

In [[physics]], two experimental techniques are often called '''complementary''' if they investigate the same subject in two different ways such that two different (ideally non-overlapping) properties or aspects can be investigated. For example, [[X-ray scattering]] and [[neutron scattering]] experiments are often said to be elementary because the former reveals information about the [[electron]] density of the atoms in the target but gives no information about the [[atomic nucleus|nuclei]] (because they are to small to affect the X-rays significantly), while the latter allows to investigate the nuclei of the atoms but cannot tell you anything about their electron hulls (because the neutrons, being neutral, do not interact with the [[charge]]d electrons).

==See also==

*[[Complement (disambiguation)]]

== References ==

{{Reflist}}

[[Category:Experimental physics]]

{{physics-stub}}