Symbols and Units

**Scientific notation**

It is often more convenient to express the numbers encountered in radiological protection in scientific, rather than decimal notation because of their magnitude. This involves the use of significant figures within desired limits and multiplication by the appropriate power of ten. Examples are shown.

**Converting decimal to scientific notation**

Decimal | Scientific |

1 230 000 100 000 3 531 15.6 0.239 0.001 0.000087 |
1.23 x 106 |

Download Appendix B - Symbols and Units