fotoelektricen efekt

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17- . . , . . e . ( ) , , : , , . 1887 , . 1888., . , . : - K, Na, Li, Zn, Rb,Be, Mg, Ca, Sr, Ba ; - . - ( ) . Ee . . (). .

, (Zn) , () , .

: (UV) . , , . 1902 () ( ). :

: . , . , , , . . . . . . . - I0 U=0. ( . - I=0 . U=Uz . . - :2 m Vmax = eU z 2

,

Vmax = 2eU z m

- . Us,

Is, . Us , Is -.

- , , . max . , .

max =

hc A

. ( ). 1905., . 1900., (), e . , , . , . . .

E=hf h f . hf. , .. , , .

,

. : mV 2 hf=A+ 2 . , , ( mV 2 ). 2

.

. me .V= 2(hf-A) me

f = f min, . .

. hf=h c

=A

10-9 s . : eU z = h(f-f min ) h. . . ( ) . Li Cs, . . U f , U = h f

h = 6,626 1O-34 J s.

.

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. , , ( ) . ,

, . , . . .

.

. . . ( 3-5 ) .

, , . , . , . . 8-14 , 106 .

( ) . . -. .

( 1990 .) . . (CRT), . , , . - (XPS) , , . . - , , .

(, , , , , UV ). , , , , . , , , , , , , , , . .

( ). - , , 1914.:

E binding = E photon E kinetic.energy E binding , E photon -, E kinetic , .

Night vision device . , . .

NVD:

NVD . , , NVD , . . NVD . NVD .O , . . , . (22), e

. 1956 . "" , - .

: " " , . () , , " " 60-80cm. , 1960., Apollo 11, " Surveyor spacecraft" . , ( ). , . , . , . .

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- http://scienceworld.wolfram.com/physics/PhotoelectricEffect.html -

http://en.wikipedia.orgNASA - Lunar Dust Buster

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http://www.launc.tased.edu.au/online/sciences/physics/photo-elec.html http://www.firstscience.com/site/articles/moonfountains.asp