What is a Roman actus and where was it used?

The Roman actus was an ancient Roman unit of length equal to 120 Roman feet, about 35.5 meters, used mainly in cadastral and agricultural surveying and defining land measurements.

Why convert Roman actus to Bohr radius?

This conversion helps relate large historical length units to atomic-scale measurements, supporting interdisciplinary research and enhancing understanding in physics and history.

Is the conversion value exact?

The conversion uses a fixed rate based on current definitions, but due to the approximate nature of the Roman actus and physical constants, exact precision is limited.

Convert Roman actus to Bohr radius [b, a.u.] - Online Unit Converter

Easily convert length from the ancient Roman actus to Bohr radius atomic units. Ideal for historical research and atomic-scale calculations bridging classical and quantum measures.

Roman actus

Bohr radius [b, a.u.]

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Roman actus to Bohr radius [b, a.u.] Conversion Table

Roman actus	Bohr radius [b, a.u.]

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Roman actus to Bohr radius [b, a.u.] Conversion Table
Roman actus	Bohr radius [b, a.u.]

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What Is This Tool?

This converter transforms length measurements from the Roman actus, an ancient Roman unit, into the Bohr radius, which is used in atomic-scale physics. It supports interdisciplinary uses from historical land surveying to quantum chemistry.

How to Use This Tool?

Enter the length value in Roman actus.
Select Roman actus as the input unit and Bohr radius [b, a.u.] as the output unit.
Click convert to see the equivalent measurement in Bohr radius atomic units.

Key Features

Converts Roman actus units, based on ancient Roman surveying lengths, to Bohr radius atomic units.
Useful for historical and scientific applications connecting macroscopic and atomic length scales.
Provides large-scale to atomic-scale conversions with a fixed conversion rate.
Browser-based and simple to use for quick calculations.

Examples

2 Roman actus equals 1,340,901,184,510.28 Bohr radius [b, a.u.]
0.5 Roman actus equals 335,225,296,127.57 Bohr radius [b, a.u.]

Common Use Cases

Translating ancient Roman land measurements for scientific comparisons.
Supporting quantum chemistry or atomic physics calculations using atomic units.
Bridging historical measurement systems with fundamental atomic constants.
Educational purposes linking classical surveying units to atomic-scale lengths.

Tips & Best Practices

Use this tool primarily for theoretical or educational comparisons due to the large numerical output.
Keep in mind the Roman actus length is approximate and may vary by historical source.
Verify unit selections before converting to ensure meaningful results.
Apply the conversion within its context—interdisciplinary studies or science communication.

Limitations

Roman actus is an approximate, ancient unit with slight historical variations.
Bohr radius applies at atomic scales, resulting in very large values for macroscopic inputs.
Conversion accuracy depends on approximations of Roman actus length and physical constants.
Numerical output is generally theoretical and not suited for practical length measurement.

Frequently Asked Questions

What is a Roman actus and where was it used?: The Roman actus was an ancient Roman unit of length equal to 120 Roman feet, about 35.5 meters, used mainly in cadastral and agricultural surveying and defining land measurements.
Why convert Roman actus to Bohr radius?: This conversion helps relate large historical length units to atomic-scale measurements, supporting interdisciplinary research and enhancing understanding in physics and history.
Is the conversion value exact?: The conversion uses a fixed rate based on current definitions, but due to the approximate nature of the Roman actus and physical constants, exact precision is limited.

Key Terminology

Roman actus: An ancient Roman length unit equal to 120 Roman feet, approximately 35.5 meters, used for land measurement and surveying.
Bohr radius [b, a.u.]: The atomic unit of length defined by the most probable electron-nucleus distance in a hydrogen atom's ground state, approximately 5.29177210903×10⁻¹¹ meters.
Actus quadratus: A square plot of land whose sides measure one Roman actus, used to define land area in Roman measurement systems.

Quick Knowledge Check

What does the Roman actus traditionally measure?

A unit of time

An ancient length unit

An atomic distance

The Bohr radius is primarily used in which field?

Ancient surveying

Quantum chemistry

Agricultural planning

Why might conversions from Roman actus to Bohr radius result in very large numbers?

Because the Bohr radius is extremely small

Because the Roman actus is very small

Because both units are similar in scale

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