Question

An electron , a proton and an alpha particle have kinetic energies of 16E,4E and E respectively. what is the qualitative order of their de Broglie wavelength?

• A. ${\lambda }_e>{\lambda }_p={\lambda }_{\alpha }$
• B. ${\lambda }_p={\lambda }_{\alpha }>{\lambda }_e$
• C. ${\lambda }_p>{\lambda }_e>{\lambda }_{\alpha }$
• D. ${\lambda }_{\alpha }<{\lambda }_e={\lambda }_p$

Answer 1

The correct option is A ${\lambda }_e>{\lambda }_p={\lambda }_{\alpha }$

correct answer: option 'A'