Nuclear Physics and RadioactivityHard
Question
In a photoelectric experiment, with light of wavelength λ the fastest electron has speed v. If the wavelength is changed to 
, the speed of the fastest emitted electron will becomes
, the speed of the fastest emitted electron will becomes Options
A.v 
B. v 
C.less than v
D.v 
greater than v
greater than v Solution
= 
+ 
mv2 ; 
= + mv12⇒ 0 =
= + 
⇒
mv12 = 
⇒ v1 > v 
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