Answer:
(a) 1.468 km/s
(b) 129.5 m
Explanation:
Use the formula for the wavelength is given by
[tex]\lambda = \frac{h}{mv}[/tex]
mass of electron, m = 9.1 x 10^-31 kg
(a) λ = 4.94 x 10^-7 m
[tex]\lambda = \frac{h}{mv}[/tex]
[tex]v = \frac{6.6\times 10^{-34}}{9.1\times 10^{-31}\times 4.94\times 10^{-7}}[/tex]
v = 1.468 x 10^3 m/s = 1.468 km/s
(b) v = 5.60 x 10^6 m/s
[tex]\lambda = \frac{h}{mv}[/tex]
[tex]\lambda = \frac{6.6\times 10^{-34}}{9.1\times 10^{-31}\times 5.60\times 10^{6}}[/tex]
λ = 129.5 m
