burning glass

From Wiktionary, the free dictionary
Jump to navigation Jump to search

English

[edit]

Noun

[edit]

burning glass (plural burning glasses)

  1. A large convex lens or concave mirror that can concentrate the sun's rays onto a small area, heating up the area and thus resulting in ignition of the exposed surface.
    Synonym: burning lens
Retrieved from "https://en.wiktionary.org/w/index.php?title=burning_glass&oldid=68704097"