File:Fse-visibility-in-smoke-v2.svg

Fse-visibility-in-smoke-v2.svg (SVG file, nominally 900 × 600 pixels, file size: 7 KB)

Summary

Smoke weakens the light from an exit sign and scatters light from the room lighting towards the observer, which lowers the contrast of the sign. Based on Jin (2002), pp. 2-42–2-43.

Original vector illustration for Visibility in smoke, level 2 Intermediate.

Source basis: Jin (2002), pp. 2-42–2-43 (two reasons for reduced visibility); Mulholland (2002), p. 2-265 (contrast threshold); Van Rossum (2027), §6.5 (more light can reduce contrast)
Alt text: Side view of a smoky corridor: light from an exit sign weakens on its way to an eye, while ceiling light scattered by smoke also reaches the eye.

Licensing

New drawing by Fire Safety Academy. © Fire Safety Academy.

File history

Click on a date/time to view the file as it appeared at that time.

	Date/Time	Thumbnail	Dimensions	User	Comment
current	17:12, 2 November 2026		900 × 600 (7 KB)	Lisa (talk \| contribs)	Watermark: Fire Safety Academy logo icon, 70 px, 45 % opacity

You cannot overwrite this file.

File usage

The following page uses this file:

Visibility in smoke

Metadata

This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.

If the file has been modified from its original state, some details may not fully reflect the modified file.

Short title	Smoke weakens the light from an exit sign and scatters light from the room lighting towards the observer, which lowers the contrast of the sign. Based on Jin (2002), pp. 2-42–2-43.
Image title	Side view of a smoky corridor: light from an exit sign weakens on its way to an eye, while ceiling light scattered by smoke also reaches the eye. Source basis: Jin (2002), pp. 2-42–2-43 (two reasons for reduced visibility); Mulholland (2002), p. 2-265 (contrast threshold); Van Rossum (2027), §6.5 (more light can reduce contrast)
Width	900
Height	600