What Is the Speed of an Electron That Has the Same

question 21

Multiple Choice

What is the speed of an electron that has the same momentum as a photon with a wavelength in vacuum of 488 nm? The mass of an electron is 9.11 × 10^-³¹ kg.

• A)1.5 × 10³ m/s
• B)1.9 × 10³ m/s
• C)2.1 × 10³ m/s
• D)2.3 × 10³ m/s
• E)2.9 × 10³ m/s

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