Noun:

நீருக்கடியில் இருந்து மேல் மட்டத்தைப் பார்க்க உதவும் ஒரு கருவி,

periscopes தமிழ் அர்த்தத்தின் உதாரணம்:

None

periscopes's Usage Examples:

In the present article, periscopes for land service and those forming part of the equipment of submarines will be described in turn.

Small German periscopes were usually 1 metre or 2 a metre in length and had two eyepieces giving magnifications 10 and 15 diameters.

Whilst in the British service sky searching up to right overhead was arranged for, German periscopes as a whole are limited to 20° above the horizontal.

From the beginning of the 20th century, however, the practical introduction of submarine navigation brought about the development of new elaborate periscopes of great length and provided with an optical system of lenses, which were built into the structure of the submarine.

Many periscopes of considerable length and special design have been used, to enable observations being made in comparative safety from behind large objects, e.

To enable a distant ship or other object to be examined more closely it is possible in some periscopes to change the magnification from a normal power of 1.

As a rule every submarine has at least two periscopes, one unifocal with a small upper tube and the other bifocal and sky-searching with a larger upper tube.

Less conspicuous periscopes were therefore designed, and these, in order to take in enough of the foreground, had to be provided with a magnifying as well as a reflecting system.

Synonyms:

U-boat, sub, optical instrument, submarine, pigboat,

Antonyms:

defend, overhead, surface, surface ship,