What is the ratio of nuclear densities of the two nuclei having mass numbers in the ratio 1:4 ?

Explanation

To find the ratio of nuclear densities of two nuclei with mass numbers in the ratio 1:4, we can follow these steps:

### Step-by-Step Solution:

1. **Define Mass Numbers**:
Let the mass number of the first nucleus (nucleus X) be \( A = a \). Therefore, the mass number of the second nucleus (nucleus Y) will be \( A' = 4a \).

2. **Determine the Radius of Nuclei**:
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