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- Anil Bhardwaj
- Animal echolocation
- Anirudh Singh
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- Ansatz
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- Antennas and Wireless Propagation Lett.
- Antennas and Wireless Propagation Letters
- Antennas and Wireless Propagation Letters, IEEE
- Anthelion
- Anthony E. Siegman
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- Anyon
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- Arrayed waveguide grating
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- Attophysics
- Attosecond physics
- Atwood machine
- Atwood number
- Audio frequency
- Audio power
- Aufbau principle
- Auger effect
- Auger electron spectroscopy
- August Beer
- August H. Pfund
- August Herman Pfund
- August Krönig
- August Kundt
- August Musger
- August Seebeck
- August Seydler
- August Toepler
- August Witkowski
- Auguste Bravais
- Auguste Piccard
- Augustin-Jean Fresnel
- Augustin-Louis Cauchy
- Augusto Righi
- Augustus William Smith
- Aureole effect
- Aurora (astronomy)
- Aurora of November 17, 1882
- Auroral chorus
- Austin Model 1
- Australian Atomic Energy Commission
- Australian Journal of Physics
- Australian Nuclear Science and Technology Organisation
- Australian Synchrotron
- Autler–Townes effect
- Autocollimation
- Autocollimator
- Autodynamics
- Automated Radioxenon Sampler Analyzer
- Automatic calculation of particle interaction or decay
- Automobile drag coefficient
- Autonomous system (mathematics)
- Autorotation (helicopter)
- Autostereoscopy
- Auxetics
- Auxiliary field
- Auxiliary field Monte Carlo
- Available energy (particle collision)
- Avalanche breakdown
- Avery Gilbert
- Avishai Dekel
- Avogadro's law
- Avrami equation
- Avshalom Elitzur
- Axel Scherer
- Axel T. Brunger
- Axial-flow pump
- Axial multipole moments
- Axial pen force
- Axial precession
- Axial ratio
- Axial tilt
- Axiality and rhombicity
- Axicon
- Axilrod–Teller potential
- Axino
- Axiomatic quantum field theory
- Axion
- Azeotrope
- Azimuthal quantum number
Read more about this topic: Index Of Physics Articles