What is the potential drop through which an electron , witha de Broglie wavelength of 1.5 "Å" , should be accelerated , if its de Broglie wavelength should be reduced to 1 "Å" ?

What is the potential drop through which an electron , witha de Brogli

1.	What is the potential drop through which an electron , witha de Broglie wavelength of 1.5 "Å" , should be accelerated , if its de Broglie wavelength should be reduced to 1 "Å" ?
Answer» 110 volts 70 volts 83 volts 55 volts Answer :C