A periscope is
an optical instrument that uses a system of prisms, lenses or mirrors to reflect images through a tube
. … At the bottom of the periscope, the light strikes another mirror and is then reflected into the viewer's eye.
What is periscope and telescope?
Published: 17 Dec, 2019. Periscopenoun.
A form of viewing device that allows the viewer to see things at a different height level
and usually with minimal visibility. Telescopenoun. A monocular optical instrument that magnifies distant objects, especially in astronomy.
What is the periscope used for?
Periscope, optical instrument used in
land and sea warfare, submarine navigation
, and elsewhere to enable an observer to see his surroundings while remaining under cover, behind armour, or submerged.
What are the types of periscope?
- a Objective lens.
- b Field lens.
- c Image erecting lens.
- d Ocular lens.
- e Lens of the observer's eye.
- f Right-angled prism.
- g Image-erecting prism.
What type of mirror or lens is periscope?
Note: For a simple periscope, only
plane mirrors
are used. For some distance visions, an enlarged view of the object is required and hence convex mirrors are helpful.
Does Periscope show who is watching?
Secondly, Twitter has finally released an analytics dashboard for Periscope.
Broadcasters will now be able to easily see how their streams are being watched
, beyond just a count of live and replay viewers along with hearts.
Is Periscope safe to use?
The Dangers of Periscope
There are definite safety concerns when it comes to Periscope, including cyberbullying, sexual harassment, and potential access to your child's location.
Since Periscope isn't monitored
, its users are often free to behave however they choose.
What is a periscope for Class 6?
A periscope is defined as
an instrument used for observing over, around or through an obstacle or object which is prevented by direct line of sight
. It consists of an outer case with mirrors at each end at 45° angle. These mirrors are placed parallel to the surface.
What is a periscope simple definition?
A periscope is
an optical instrument that uses a system of prisms, lenses or mirrors to reflect images through a tube
. Light from a distant object strikes the top mirror and is then reflected at an angle of 90 degrees down the periscope tube.
How far can a periscope see?
Hello Jayn, the distance you can see depends very much on the height of the periscope. Because of the curvature of the earth with the naked eye you can only ever see as far as the horizon. At sea this is
around 11 to 12 miles
.
How is periscope constructed?
Periscopes can be constructed using
a pair of flat mirrors or prisms and a rectangular hollow tube that has a viewing window at the top and bottom of the tube
. The mirrors within this structure are fixed at an angle of 45
o
at the two ends of the rectangular hollow.
Can you trace the path of light from the object through the periscope to your eye?
A periscope lets you look around walls, corners or other obstacles. … In a periscope, light from an object strikes the top mirror at 45° and bounces off at the same angle. This sends light directly down the tube and onto the lower mirror. This mirror, also at a 45° angle, reflects light directly to your eye.
On what principle does periscope work?
Complete step-by-step answer: A periscope is based on
the Laws of Reflection
, which says that the light from the object falls on a mirror at an angle of 45 degrees from the surface and is mirrored. The mirrored light then falls on another mirror and is mirrored again until it enters the human eye.
Does Periscope show your location?
What many Periscope users might not realize is the exact location you're live-
streaming from is displayed on a map under your stream
. Viewers can even zoom in to see individual street names and pinpoint almost the exact location someone is streaming from.
Can you watch Periscope without an account?
You don't need the Periscope app or even a Periscope account.” …
Users will have to sign into Periscope to interact with
the videos — and you cannot chat with broadcasters without an account.
How do people find you on Periscope?
- Go to the People Tab.
- Tap the search icon in the top left on iOS, and in the bottom right on Android.
- Enter the username of the account you're looking for in the search bar.
- Tap the plus icon to follow.
