dispersion

分散、散在

広い範囲や多くの場所に散らばっている状態。

やさしい英語で： The state of being spread over a wide area or among many places.

• The population shows wide dispersion.
• The dispersion of settlements makes transport difficult.
• We measured the dispersion of particles across the surface.

使い方： dispersion of something (The dispersion of houses increases delivery costs.)

類義語： spread, scattering

反対語： concentration

よく使う表現： wide dispersion, geographic dispersion, dispersion of something

散布、拡散

人や物がある範囲や別々の方向へ広がっていくこと。

やさしい英語で： The process of spreading people or things over an area or in different directions.

• Wind helps the dispersion of seeds.
• Rain slowed the dispersion of dust.
• The rapid dispersion of the crowd left the square empty.

使い方： dispersion of something (The dispersion of pollen depends on the wind.)

類義語： dispersal, scattering

反対語： concentration

よく使う表現： seed dispersion, dispersion of something, rapid dispersion

散らばり、分散

数値の集まりが互いに、または平均からどれほど離れているか。

やさしい英語で： How widely numbers in a set differ from each other or from their average.

• The scores show high dispersion.
• We calculated the dispersion of the measurements.
• Lower dispersion means the values are closer together.

類義語： spread, variability

よく使う表現： data dispersion, measure dispersion, high dispersion

分散

異なる周波数の波が進む間に分かれる現象。白い光が色に分かれるなど。

やさしい英語で： The separation of waves with different frequencies as they travel, such as white light separating into colours.

• A prism causes dispersion of light.
• Dispersion separates white light into different colours.
• The experiment measured wave dispersion in the material.

よく使う表現： optical dispersion, light dispersion, wave dispersion