Question

Calculate the wavelength of a bass which mass is 0.1 kg and velocity 10 metre per second -1

Answer 1

$\bigstar$ Given

⇒ Mass = 0.1 kg

⇒ Velocity = 10 ms⁻¹

$\bigstar$ To Find

Wavelength

$\bigstar$ Solution

We know that

$\red{\sf \longrightarrow \lambda=\dfrac{h}{mv}}$

Here

• λ = wavelength
• h = planck's constant
• m = mass
• v = velocity

According to the question

We are asked to find the wavelength

Therefore

We must find "λ"

Given that

⇒ Mass = 0.1 kg

⇒ Velocity = 10 ms⁻¹

Hence

• m = 0.1 kg
• v = 10 ms⁻¹

We know that

• h = 6.626 x 10⁻³⁴ J s

Substituting the values

We get

$\orange{\sf \longrightarrow \lambda=\dfrac{6.626 \times 10^{-34}}{0.1 \times 10} \ m}$

On further simplification

We get

$\pink{\sf \longrightarrow \lambda=6.626 \times 10^{-34} \ m}$

Therefore

$\checkmark$ Wavelength = 6.626 x 10⁻³⁴ m