Question

A 0.66 kg ball is moving with a speed of 100 m/s. The associated
wavelength will be (h = 6.6´10⁻³⁴ Js) :
(a) 1.0 ´ 10⁻³²m (b) 6.6 ´ 10⁻³²m
(c) 6.6 ´ 10⁻³⁴m (d) 1.0 ´ 10⁻³⁵m

Answer 1

The wavelength of the ball is λ = 1 x 10⁻³⁵ m.

Option (D) is correct.

Explanation:

• Mass of ball = 0.66 Kg
• speed of ball "v" = 100 m/s

Solution:

λ = h / mv

λ = (6.6 x 10⁻³⁴) / (0.66 x 100)

λ = 1 x 10⁻³⁵ m

Thus the wavelength of the ball is λ = 1 x 10⁻³⁵ m.

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