dispersion

dispersion — noun

1. the movement of people, animals, or things away from a central point, so that th

1.名詞B2
釋義

the movement of people, animals, or things away from a central point, so that they spread out over a larger area

例句

The dispersion of the crowd after the concert took less than fifteen minutes.

dispersion of + crowd/group

Scientists measured the dispersion of pollen from the sunflower field across nearby farmland.

dispersion of + natural particles

同義詞
  • dispersal

    more common for living things such as animals or seeds; otherwise very similar

  • scattering

    less formal; suggests random or unplanned spreading

  • diffusion

    focuses on gradual mixing through a medium, often used in science

  • distribution

    broader term; implies an arranged or measured spread rather than chaotic scattering

反義詞
  • concentration

    the act of gathering things together in one place

  • collection

    bringing items or people into a single group

文法句型

dispersion of + noun phrase

用法筆記

Uncountable. 'Dispersal' is more common for living organisms, while 'dispersion' also covers particles and physical phenomena. Frequently used in academic and formal writing.

常見錯誤

❌There was a wide dispersion of the seeds by the wind.
✅The seeds were widely dispersed by the wind.
💡'dispersion' as a noun is uncountable; do not use 'a' before it.
❌The dispersion of the group happened very quick.
✅The dispersion of the group happened very quickly.
💡use an adverb, not an adjective, to modify the verb.

2. the effect produced when white light is split into its different colours — for e

2.名詞C1
釋義

the effect produced when white light is split into its different colours — for example, when it passes through a prism, water droplets, or similar objects

例句

A glass prism demonstrates the dispersion of white light into a full spectrum of colours.

prism demonstrates dispersion of light

Lakshmi's physics project explained how dispersion causes the colours in a rainbow to appear.

同義詞
反義詞
  • convergence

    the act of rays coming together rather than separating

文法句型

dispersion of + light/white light

用法筆記

Uncountable. A specialised term in physics and optics. Do not confuse with 'refraction' (the bending of light) or 'diffraction' (the spreading of waves around obstacles) — dispersion specifically refers to the separation into colours.

常見錯誤

❌A rainbow is caused by the refraction of sunlight in raindrops.
✅A rainbow is caused by the dispersion of sunlight in raindrops.
💡refraction is the bending; dispersion is the splitting into colours.