The uncertainty in the location of a particle moving with velocity 7.28 X 107m /s is two times its de-Broglie wavelength. What is the uncertainty in measuring the velocity?

• A. 5.79 X 106 m/s
• B. 6.12 X 106 m/s
• C. 7.63 X 106 m/s
• D. 8.45 X 106 m/s