A particle of a mass M at rest decays into two particles of masses `m_1 and m_2` having non-zero velocities. What is the ratio of the de-Broglie wavelength of the two particles?

Explanation

To solve the problem of finding the ratio of the de-Broglie wavelengths of two particles resulting from the decay of a particle of mass \( M \) at rest into two particles of masses \( m_1 \) and \( m_2 \), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Initial Conditions**:
The initial particle of mass \( M \) is at rest, which means its initial momentum is zero.

2. **Apply Conservation of Momentum**:
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