What are logarithms used for today?

Answer 1

Here are just a few modern uses for logarithms:

• The Saffir-Simpson Hurricane Scale, Richter Magnitude Scale, and pH scale are all based on logarithms.
• You see brightness on a logarithmic scale, so as light becomes constantly brighter, it starts having less relative affect on your vision.
• Musical notes are measured logarithmically, and the frets on a guitar grow closer together as the notes become higher in pitch.
• Engineering data is sometimes graphed on a logarithmic scale.