Planck's Constant Is 6

question 1

Multiple Choice

Planck's constant is 6.6 * 10^-34 J·s and the electron mass is 9.1 * 10^-31 kg.The de Broglie wavelength of an electron whose speed is 2.0 * 10⁷ m/s is

• A)2.8 * 10^-10 m.
• B)3.6 * 10^-10 m.
• C)3.6 * 10^-11 m.
• D)2.8 * 10¹⁰ m.