WOLFRAM

Wolfram Language & System Documentation Center

"PhysicalConstant" (Interpreter Type)

Related Entity »
Natural-language reference to a physical constant.

Details

  • "PhysicalConstant" can be used in Interpreter and related constructs, including deployed smart fields.
  • Use of "PhysicalConstant" requires connectivity to the Wolfram Cloud.

Allowed Forms

  • Any natural-language description of a physical constant.

Restriction Specifications

  • Restricted["PhysicalConstant", {{choice1,…}}]one among choices
    Restricted["PhysicalConstant", entityclass]one among the physical constants of entityclass

Interpretation

  • "PhysicalConstant" yields an Entity of type "PhysicalConstant".

Examples

open all close all

Basic Examples  (3)

Interpret "speed of light" as a physical constant:

Wolfram Language code: Interpreter["PhysicalConstant"]["speed of light"]

Obtain the corresponding value in standard units:

Wolfram Language code: %["Value"]

Interpret "planck's constant" as a physical constant:

Wolfram Language code: Interpreter["PhysicalConstant"]["planck's constant"]

Obtain the corresponding numerical value in standard units:

Wolfram Language code: %["Value"]//N

Restrict to physical constants in a class:

Wolfram Language code: Interpreter[Restricted["PhysicalConstant", EntityClass["PhysicalConstant", "Cosmological"]]]["speed of light"]

Possible Issues  (1)

A failure is returned if no physical constant interpretation exists with the specific restriction:

Wolfram Language code: Interpreter[Restricted["PhysicalConstant", EntityClass["PhysicalConstant", "Cosmological"]]]["planck's constant"]

If a physical constant satisfying the given restriction exists, it is returned:

Wolfram Language code: Interpreter[Restricted["PhysicalConstant", EntityClass["PhysicalConstant", "Thermodynamic"]]]["planck's constant"]