optical
part of speech
adjective (optical); adverb (optically)
meaning for a pupil
1) To do with seeing and the eyes. tree →
2) To do with light and how it travels, or with instruments that use light, such as lenses, microscopes and telescopes. tree →
sense in the lessons
In science, «optical illusion» is a picture that tricks your eyes and brain; «optical fibre» carries light (and internet data) along thin glass threads. Opticians sell glasses. Phrases: «optical illusion», «optical fibre», «optical instrument», «optical mouse».
examples
- The picture is an optical illusion: the two lines look different but are the same length. tree →
- Optical fibres carry internet signals as flashes of light. tree →
- A telescope is an optical instrument. tree →
- The optical mouse uses a tiny light to see movement. tree →
- Optical shops sell glasses and contact lenses. tree →
- The magician used optical tricks with mirrors. tree →
note
Adjective. Related: optician (a person who tests eyes and sells glasses), optics (the science of light). UK spelling «optical fibre», US «optical fiber». Trap: «optical» is about sight and light, not «optional» (you can choose).
Trees and pragmatics
Every meaning and example of «optical» parsed by Mova, each sentence with its dependency tree and frames.