Question

Calculate the wave length of an electron moving with a velocity of 300 km/s​

Answer 1

Explanation:

2.427×10^-9 is the right answer bythe de- brogli wavelength formula

Answer 2

Answer:

$6.6 \times {10}^{ - 34} \div mv = 2.41 \times {10}^{ - 9}$

Explanation:

$m = 9.1 \times {10}^{ - 31} kg$V = 300 × 1000 m/s=3 × 10^5m/s

h= 6.6 × 10^-34 Js

wavelength=h/mv

put these values in the equation and get your answer.

Note:- It is essential to take care of units.

Here all the units should be S.I unit.