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Found 2 translations.
| Name | Current message text |
|---|---|
| h English (en) | </noinclude> <!-- 9. Construct one optical instrument using mirrors or lenses, such as a periscope, a slide or opaque projector, or a simple telescope. --> ===Periscope=== [[Image:Simpleperiscopes.png|thumb|350px|right|'''Principle of the periscope.'''<br> '''A''' - Periscope using two plane mirrors.<br> ''' B''' - Periscope using two right–angled prisms.<br> '''1 - 2''' - Plane mirrors.<br> '''3 - 4''' - Right–angled prisms.<br> '''5 - 6''' - Observer eye.<br> '''7 - 8''' - Periscope tube.<br> '''H''' - Periscope optical height.<br> '''Different types of periscopes:'''<br> Lens periscopes. [http://commons.wikimedia.org/wiki/File:Periscope_1.png]<br>Handheld periscope. [http://commons.wikimedia.org/wiki/File:Handheld_periscope.png]<br> Submarine periscope.[http://commons.wikimedia.org/wiki/File:Attack_periscope.png]]] A periscope is an instrument for observation from a concealed position. In its simplest form it is a tube in each end of which are mirrors set parallel to each other and at an angle of 45° with a line between them. |
| h Spanish (es) | </noinclude> <!-- 9. Construir un instrumento óptico usando espejos o lentes, como un periscopio, una diapositiva o proyector de opacos o un simple telescopio. --> |
