The speed of an electron having a wavelength of 10⁻¹⁰ m is

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The speed of an electron having a wavelength of 10⁻¹⁰ m is

Options

(a) 6.26×10⁶ m/s
(b) 5.25 x10⁶ m/s
(c) 7.25×10⁶ m/s
(d) 4.24×10⁶ m/s

Correct Answer:

7.25×10⁶ m/s

Explanation:

λ = h / momentum = h / mv

v = h / mλ = 6.6 × 10⁻³⁴ / (9 × 10⁻³¹) × 10⁻¹°

v = 7.25 × 10⁶ ms⁻¹

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Topics: Dual Nature of Matter and Radiation (150)
Subject: Physics (2479)

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