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if yous answer is options 1,3,4 then you have to fill the Answer as ‘134’
If your answer is options 2, 4 then you have to fill the answer as '24'
A beam of electron is used in an electron YDSE experiment. The slit width is d. When the velocity of electron is increased, then
1) No interference will occur
2) Fringe width increases
3) Fringe width decreases
4) Fringe width remains same

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answer is 3.

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Detailed Solution

$For electron, λ = \frac{h}{mv} β = λ \frac{D}{d} = \frac{hD}{mvd} S o h i g h e r t h e v e l o c i t y, l e s s t h e f r i n g e w i d t h$

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