How fast must a 5 4 g tennis ball travel in order to have a de Broglie wavelength that equal to that of a photon of green light 5400overset(0)(A)?

How fast must a 5 4 g tennis ball travel in order to have a de Broglie

1.	How fast must a 5 4 g tennis ball travel in order to have a de Broglie wavelength that equal to that of a photon of green light 5400overset(0)(A)?
Answer» SOLUTION :m=mass of TENNIS ball =`54 g =5.4xx10^(-2)kg.` `gamma`=DE Broglie wacelength`=5400overset(0)(A)=5400xx10^(-10)m` `gamma=4/(mV)` `V=h/(gamma.m)` `(6.626xx10^(-34))/(5400xx10^(10)xx5.4xx10^(-2))` `=(6.626xx10^(-34)xx10^(10)xxcancel(10^(2)))/(cancel(5400)x5.4)` `=(6.626xx10^(-24))/(54xx5.4)` `=(6.626xx10^(-24))/(291.6)` `=2.27xx10^(26)m`