Noun:

फ़ोटोग्राफ़ी का एक शीशा, एक यंत्र जिसकी सहायता से खाई में रह कर व्‍यक्ति खाई पर बने सुरक्षात्‍मक दुर्ग के ऊपर की या पानी में थोड़ी डूबी हुई पनडुब्‍बी में से पानी के ऊपर की वस्‍तुऍं देख सकता है, परिदर्शी, पेरिस्‍कोप,

periscope's Usage Examples:

And in the World War, while optical instruments of this kind were elaborated and improved, the periscope as such came into use for the infantry garrisoning trenches.

Krupp for use for the outer tube of the German navy periscope used before the war, and a similar steel was developed and used in the British service, but it is costly and more difficult to machine to the required accuracy than is the case with bronze.

It is therefore necessary to train the periscope round when taking observations on different bearings.

The periscope when installed in the submarine is used for two purposes: (a) general observation for submerged navigation; (b) for correctly aligning the submarine when firing a torpedo at a target.

When the periscope is not in use, the prism is lowered and protects the upper lens in the body.

Of these the most remarkable is the German Giant Periscope, two specimens of which exhibited in the collection of trophies in the Imperial War Museum, Crystal Palace, have excited considerable popular interest.

In an ingenious periscope designed by Messrs.

The modern practice is to take rapid observations rather than to keep the periscope above the water all the time.

Zeiss made a periscope 7 metres long, main tune 150 mm.

The word " periscope" was first applied to this instrument.

Synonyms:

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

Antonyms:

defend, overhead, surface, surface ship,