periscope
/ˈperɪskəʊp/noun
उच्चारण पेरिस्कोप
परिदर्शी, पेरिस्कोप
Core word
noun
- 1
[C]
a device like a long tube containing mirrors, which lets you see over the top of something, used especially in a submarine to see above the surface of the water
परिदर्शी, पेरिस्कोप
- The captain raised the periscope to look at the enemy ship.
- Children made a simple periscope from cardboard and two mirrors.
- The submarine's periscope broke the surface of the water.
+ 2 more examples
- With a periscope, you can look over the heads of a crowd.
- We built a periscope for our school science fair.
✓In the exam
General knowledge
A periscope works on the principle of reflection, using two plane mirrors fixed at an angle of 45 degrees.
GK: Periscope परावर्तन के सिद्धांत पर काम करता है और इसमें 45 डिग्री के कोण पर लगे दो समतल दर्पण होते हैं।