Question

How fast is an electron travelling If it has a wavelength of 8.20 km?

Answer 1

The electron is travelling with a velocity of 1.123 × 10⁷m/s if it has a wavelength of 8.20 km.

How to calculate velocity of an electron?

The velocity at which an electron travels can be calculated using the following formula:

λ = h/mv

Where;

• H = Planck's constant
• m = mass of electron
• v = velocity of electron
• λ = wavelength

• Planck's constant (h) = 6.626 × 10−³⁴ J⋅s.
• mass of electron (m) = 9.109 × 10−³¹ kg
• wavelength = 8200m

8200 = 6.626×10−³⁴ / 9.109 × 10−³¹V

8200 = 7.3 × 10-⁴V

V = 8200 ÷ 7.3 × 10-⁴

V = 1.123 × 10⁷m/s

Therefore, the electron is travelling with a velocity of 1.123 × 10⁷m/s if it has a wavelength of 8.20 km.

Learn more about velocity at: brainly.com/question/13171879

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