Title
A periscope is an instrument for directing rays of light from one direction to another
Caption
A periscope is an instrument for directing rays of light from one direction to another so that we can see things which, without it, would be obscured by some opaque object between us and them.
Date
2015
Credit line
Photo12/Ann Ronan Picture Library
Reference
ARP17A23_482
License type
Rights managed
Available size
60,0Mb (1,8Mb) / 12,2in x 19,1in / 3654 x 5740 (300dpi)