Difference between revisions of "AY Honors/Camping/Fire/Curved glass"
m (W126jep moved page Adventist Youth Honors Answer Book/Camping/Fire/Curved glass to AY Honors/Camping/Fire/Curved glass without leaving a redirect: Part of translatable page "Adventist Youth Honors Answer Book/Camping/Fire/Curved glass") |
|||
| (8 intermediate revisions by 3 users not shown) | |||
| Line 1: | Line 1: | ||
| + | <noinclude><translate><!--T:4--> | ||
| + | </noinclude> | ||
A piece of curved glass can sometimes be used to focus the rays of the sun, igniting the tinder. The glass must be smooth enough to not overly-distort the point of light. A magnifying glass is the typical sort of lens used for this, but there are other possibilities in a pinch. | A piece of curved glass can sometimes be used to focus the rays of the sun, igniting the tinder. The glass must be smooth enough to not overly-distort the point of light. A magnifying glass is the typical sort of lens used for this, but there are other possibilities in a pinch. | ||
| − | It is [http://wildwoodsurvival.com/survival/fire/ice/index.html possible], for instance, to use a piece of ice shaped into a sphere to do the same job. Getting the piece of ice round enough and, clear enough, and smooth enough to ignite a fire, however may | + | <!--T:2--> |
| + | It is [http://wildwoodsurvival.com/survival/fire/ice/index.html possible], for instance, to use a piece of ice shaped into a sphere to do the same job. Getting the piece of ice round enough and, clear enough, and smooth enough to ignite a fire, however may prove to be difficult. | ||
| + | <!--T:3--> | ||
[http://wildwoodsurvival.com/survival/fire/cokeandchocolatebar/ Others] have reported success in polishing the bottom of a soda can, and using it as a mirror to reflect the sun's rays onto a point. Again, it takes a lot of patience to polish the can well enough to be able to light a fire this way, but it has been done. The polishing material can be any fine rouge-like substance, such as clay. The surprising thing about this particular technique is that a chocolate bar has been used as the polishing compound! | [http://wildwoodsurvival.com/survival/fire/cokeandchocolatebar/ Others] have reported success in polishing the bottom of a soda can, and using it as a mirror to reflect the sun's rays onto a point. Again, it takes a lot of patience to polish the can well enough to be able to light a fire this way, but it has been done. The polishing material can be any fine rouge-like substance, such as clay. The surprising thing about this particular technique is that a chocolate bar has been used as the polishing compound! | ||
| + | <noinclude></translate></noinclude> | ||
Latest revision as of 17:52, 2 September 2021
A piece of curved glass can sometimes be used to focus the rays of the sun, igniting the tinder. The glass must be smooth enough to not overly-distort the point of light. A magnifying glass is the typical sort of lens used for this, but there are other possibilities in a pinch.
It is possible, for instance, to use a piece of ice shaped into a sphere to do the same job. Getting the piece of ice round enough and, clear enough, and smooth enough to ignite a fire, however may prove to be difficult.
Others have reported success in polishing the bottom of a soda can, and using it as a mirror to reflect the sun's rays onto a point. Again, it takes a lot of patience to polish the can well enough to be able to light a fire this way, but it has been done. The polishing material can be any fine rouge-like substance, such as clay. The surprising thing about this particular technique is that a chocolate bar has been used as the polishing compound!
