Sextant | Optics ✡

The Sextant ✡

{Formula}

Angle of incidence = angle of deflection!

Before the sextant was invented there was the astrolabe instrument.

Marine sextant
Aircraft bubble sextant

The [frame] of a sextant is in the shape of a [sector] which is approximately 1⁄6 of a circle (60°), hence its name (sextāns, sextantis is the Latin word for "one sixth").

Both smaller and larger instruments are (or were) in use: the octant, quintant (or pentant) and the (doubly #reflecting) quadrant span [sectors] of approximately 1⁄8 of a circle (45°), 1⁄5 of a circle (72°) and 1⁄4 of a circle (90°), respectively. All of these instruments may be termed "sextants".

A sextant is a doubly #reflecting navigation instrument that measures the angular distance B/#tween two visible {objects}. The primary use of a sextant is to measure the angle B/#tween an astronomical {object} and the horizon for the purposes of celestial navigation.

The estimation of this angle, the altitude, is known as sighting or shooting the {object}, or taking a sight.

The angle, and the time when it was measured, can be used to calculate a position line on a nautical or aeronautical [chart]. For example, sighting the Sun at noon or Polaris at night (In the Northern Hemisphere)

to estimate latitude (With sight reduction).

Sighting the height of a landmark can give a measure of distance off and, held horizontally, a sextant can measure angles B/#tween {objects} for a position on a [chart]. A sextant can also be used to measure the lunar %distance% B/#tween the moon and another celestial {object} (such as a star or planet) in order to determine Greenwich Mean Time [G:M:T] and hence longitude.

The Devil's eye: The so called established science relies on physical evidence in terms of #visual testimony.

Holistic approach: Micro cosmos = Makro cosmos.

6. Scalability (#Lv9 Vector)

✡✡✡ Lt. General

✡✡✡ Colonel

✡✡✡ Captain

Semantics (relating to meaning in language or logic)

[3:4:7] Captain (3-star or 4-star in some [countries]) △/☐

[3:6:9] Major (I am the #lv6 scalability)

Russian nuclear submarines

{Project} [6:5:7]

{Project} [6:6:7]

{Project} [6:7:5]

Source of the #light

Spring equinox: Set the clocks 1 hour forward
Summer solstice: The longest day of the year
Autumn equinox: Set the clocks 1 hour back
Winter solstice: The shortest day of the year

#Lv0 In the beginning zero did not exist, which led to different numeral systems. A #lv1 baseline was the beginning (direct forward).

Optical illusion

How to get an exact volume reading in laboratory glass fixtures.

A true horizon vs. visible horizon

The true horizon is circle defined by the line of sight from an observation point that is a tangent line to a sphere. The visible horizon is the actual local line dividing Earth features and sky.

For further O/rientation beyond this [page] △

1. Astronomical horizon

2. True horizon

3. Visible horizon

Optics and Photonics

#Lv6 Keywords

#AbsentMindedness

#Abstraction #GeometricAbstraction

#Afterlife

#Aspect ratio

#Aura Energy {field}

#Aurora Borealis (Northern lights)

#Beam #TractorBeam (Star✩Trek)

#Bioscope (an early generic name for a movie camera)

#Camera

#Candle #CandleSrying

#Chimera

#Cinema

#Clairvoyance (a claimed psychic ability to gain information about an {object}, person, [location], or physical event through extrasensory perception (ESP))

#Corona

#Daydream #Lucid dream

#Deepfake [pictures], [videos] and /upcoming #AI /generated [music]

#Delusion

#Diorama

#Eclipse #lunar eclipse #solar eclipse

#Ethereal (extremely delicate and #light in a way that seems not to be of this world)

#Fog

#Fractal structures

#Hallucination

#Helix/Vortex

#Hell (means bright in German)

#Hindsight

#Holistic (#Macro cosmos vs. micro cosmos)

#Hologram

#Horizon #Visible horizon vs. True horizon

#Illusion #OpticalIllusion

#Illustration

#Imaginary #Imagination #Imagining #Vivid imagination

#LASER (Acronym: Light Amplification by the Stimulated Emission of Radiation)

#Limelight

#Matrix

#Māyā (Vedic, the powerful force that creates the cosmic #illusion that the phenomenal world is real)

#Microscope

#Mirage (Fata Morgana)

#Mirror #Mirror scrying

#Numeral vs. phenomenal universe

#Optical illusion

#Phantasmagoria

#Phantom

#Photonics

#Physical vs. Logical

#Prism /△ (convex vs. concave)

#Purgatory #Digital Purgatory

#Reality #AugmentedReality (AR) #VirtualReality (VR)

#Reflection (micro reflections on a macro scale)

#Refraction (phenomenon of light)

#Remote viewing (#mediumship, a technique to see the living, not the dead)

#Retrospective

#Sexology (#Initio of life/death cycle (8))

#Scalability

#Scanning

#Scintillation

#Silhouette (the dark shape and outline of someone or something #visible in restricted light A/#gainst a brighter background)

#Skimming through the [pages]

#Speculation of the wise (philosophy)

#Speculum

#Spectrograph

#Spectrum #Spectrum analyzer

#Telescope vs. Space Telescopes (Hubble, Kepler, James Webb, etc.)

#The eye of Ra (Egyptology)

#The eye of the tiger (make it look so delightful it seems not to be of this world)

#The source of the Sun light came in the #twillight of the moon

#The curse of the sun and the moon

#Trance

#TV #TV scrying (Poltergeist 1982, Big bang theory stretched out light waves becoming microwaves, that causes the static noise on a TV channel)

#Twilight

#Vision

The famous 1,000-yard stare (snipers can aim at 1,000 to max. 1,200 yards) I got as soon I stepped out of the bus being a deployed soldier and were told to look out for snipers on a cigarette break. Whilst %distance% has no matter in the invisible [realm], I never-ever got short-sighted A/#gain. It looks like a curse of the elements, in this case air. It only gets worse by watching TV all day long with far A/way movies. Now, all I do is to drink and smoke and sit indoor all day long. Ironically, I go half-blind, while all the eyes need to stay fit is the element of air. A gift and a curse at the same time.

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Sextant | Optics ✡

The Sextant ✡

Optics and Photonics