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Op- Opacity
- The condition of being non-transparent.
- Open Circuit Voltage
- The voltage between the terminals of a battery or power source when no current is flowing.
- Open Interval
- An interval that does not include its two endpoints.
- Open Loop
- A system operating without feedback.
- Open Loop Gain
- Gain of an amplifier when no feedback is present.
- OpenGL
- A graphics standard providing advanced rendering capabilities.
- Operating Point
- That point in the characteristics of a tube or transistor around which the signal voltages vary.
- Operational Amplifier
- One of the basic building blocks of analogue circuits.
- Opposite Faces
- Faces that lie in parallel planes.
- Opposition
- The point at which a planet that is further away from the Sun than the Earth.
- Optic Axis
- A line passing through the center of a curved mirror and the center of the sphere
from which the mirror is made.
- Optical Axis
- A line passing through the centres of curvature of a lens or series of lenses in an optical system.
- Optical Cavity
- Space between the laser mirrors where lasing action occurs.
- Optical Flat
- A piece of glass with one or both surfaces polished flat.
- Optical Interference
- The interaction of two light waves on the total intensity of light.
- Optical Pumping
- The excitation of the lasing medium by the application of light rather than electrical discharge.
- Optical Pyrometer
- An instrument for measuring the temperature of heated material.
- Optics
- Lists all the Optics topics
- Optics Calculations
- Lists all Optics Calculations in the Encyclopaedia
- Optics Conversions
- Lists all Optics Conversions in the Encyclopaedia
- Optics Weblinks
- Lists all Optics Weblinks in the Encyclopaedia
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