Not long ago, have a group of pictures that the tourist films in Wuhan: There are a lot of strange conglomerate form objects in the sky, glisten in night sky.
The netizen exclamations: This is UFO!
Hit a face to come too quickly nevertheless! After the netizen passes the analysis of sensible and objective profundity, express, this cannot be UFO absolutely!
The reason is as follows:
It is a picture handle through writing graph software apparently, exist far from in reality.
2 it is people made laser to low altitude cloud layer form design, be filmed by the netizen fitly.
This analysis listens suddenly quite reasonable, but hit a face to come very quickly again!
A flock of cameraman are carrying camera of on 10 thousand high end to come out to explain directly: Where be laser, it is to photograph the super and simple principle in resembling clearly " ghost shadow phenomenon " !
State first, everybody is afraid that the young associate of ghost must not fear, without ghost!
"Ghost shadow phenomenon " it is a professional term in photography, also cry " dazzle " , those who point to is: When people when filming the environment has a particularly bright light source, the reflex in lens can form ghost film.
Understand do not have nothing to do with, explain:
You stand when darker place takes very bright thing, after the light enters camera lens, meeting generation is reflexed for many times, can form a very clear window in proper place next, resemble ghostliness and same.
Anyhow is, radial difference is offended disaster.
Glazed line difference is too normal in the life, there also are a lot of people to had been patted before this so " ghost shadow " .
Ever had a story, ms. Xu that lives in Beijing ever also was patted " unidentified object " .
Ms. Xu is a primary school teacher, play the photography game that the school organizes to help the child, they come east Guan Daqiao takes night scene.
Much at 8 o'clock in the evening, ms. Xu aims camera the canal big bridge of lights brightly lit, press the instant of shutter, the eye was shaken suddenly by light of one spoken parts in an opera, when she looks up to see night sky again, inky however, not unusual.
Until after coming home, she guides the photograph the ability in computer discovers, by Bai Guang " shine " a strange thing appeared in that piece of photograph. It in the sky appears in the bridge, appearance is exactly like the person entity that pitch of a body is stretching his hand, be white all over.
Ms. Xu takes the picture below
After the expert is investigated, conclude, the photograph did not revise a trace.
As a result of when filming, use slow fast shutter, this illuminant may be some kind of light reflexes camera lens to go up, appear below time exposure influence " facula " , namely ghost shadow phenomenon.
So cerebral hole, does the mobile phone film can shadow of there is sth fishy?The answer is: Do not meet!
The mobile phone that it is what won't, is camera photographed than the mobile phone advanced like the head?
Still be really, the account that ghost shadow phenomenon produces is however be camera photograph more advanced like the head --
This is the knot composition of a picture of camera lens of a piece of camera, OK and clear see: Camera camera lens is not a single lens, form by many lens however.
Look character from material, camera lens uses glass or plastic wait for material to make. The glasswork with this kind of qualitative material, if do not undertake special processing, lens surface can reflex about 5% incident lights of the left and right sides.
When Jiang Guangjin enters camera lens, the exterior catoptric light of each lens can be mixed in camera lens camera interior is reflexed for many times, very easy generation " dazzle " .
But the mobile phone does not have this kind of device, also cannot see naturally.
Said so much, "Ghost shadow " sound dazzle cruel, it is actually in the life in if had been used, also have the effect of do with sb unconscious.
Cite a case: In the Second World War, the Suez Canal with the most important England, the banging prang that facing German opportunity for combat is bad, however canal building is huge, traditional camouflage method makes the canal is not discovered by De Jun very hard apparently.
Somebody offerred a very good proposal: "If you want to make some type thing is not seen, charmer can help you " , because this Englishman finds a famous charmer Mr.Maskelyne.
Charmer thought of to use at a draught " ghost shadow " .
He installed a lot of gyral searchlight along the canal, produced a large number of dazzle to the enemy bomber driver of the patronage in night, make its very difficult discover the canal cuts the position really.
The dirt that often adheres to on the windshield of enemy plane at the same time, drip reachs a few nick, these traces produce scattering to illuminate of intense beam of light, disturbed the line of sight of enemy further.
such, resemble really magic and general, the Englishman protected a the Suez Canal in what succeed in World War II.
Do not pass, the dazzle in the life also is not good completely, it also is the culprit of a lot of traffic accident.
Far lamplight too dazzling, the driver is prickled with respect to easy eyestrain and cannot see way, raise the possibility that produces traffic accident then.
Do not believe you to stare at this Zhangzhang pursues above the move piece, look one minute to try.
So, treasure oneself life, also treasure the life of other. Drive in the evening, do not open headlights on full beam casually, very mean really!
This period popular science arrives here, below period adieu!
