Photoelectric effect


Photoelectric effect

Photoelectric emission is the phenomena by which a good number
of  substances, chiefly  metals,emit  electrons  under  the  influence  of radiation such as γ rays, X-rays, ultraviolet and even visible light. This effect  was  discovered  by  Heinrich  Hertz  in  1887  while  working  with resonance electrical circuits. Hallwachs,Elster and Geitel investigated the phenomenon with a simple experimental arrangement after one year.


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Algebra Formulas collection

(a+b) 2  = a 2  + b 2  + 2ab (a-b) 2  = a 2  + b 2  – 2ab (a+b) (a-b) = a 2  – b 2 (x + a)(x + b) = x 2  + (a + b)x + ab (x + a)(x – b) = x ...