Meaning of Periscopes

English: Periscopes
Type: Unknown / অজানা / अज्ञात

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Definition: 1

an optical instrument for viewing objects that are above the level of direct sight or in an otherwise obstructed field of vision, consisting essentially of a tube with an arrangement of prisms or mirrors and, usually, lenses: used especially in submarines.

Definition: 2

a periscopic lens.

Definition: 3

any of a number of optical instruments that enable the user to view objects that are not in the direct line of vision, such as one in a submarine for looking above the surface of the water. They have a system of mirrors or prisms to reflect the light and often contain focusing lenses