question_answer

A parallel beam of electrons travelling in x-direction falls on a slit of width d (see figure). If after passing the slit, an electron acquires momentum \[{{p}_{y}}\] in the y-direction then for a majority of electrons passing through the slit (h is Planck's constant) : JEE Main Online Paper (Held On 10 April 2015)

A) \[|{{p}_{y}}|d>h\]                         

B) \[|{{p}_{y}}|d>>h\]

C) \[|{{p}_{y}}|d<h\]                         

D) \[|{{p}_{y}}|d\simeq h\]