How many lattice points are there in one unit cell of each of the following lattices?
(i) Face centred cubic lattice.
(ii) Body centred cubic lattice.

Explanation

To determine the number of lattice points in one unit cell for the face-centered cubic (FCC) and body-centered cubic (BCC) lattices, we will analyze each type of lattice step by step.

### (i) Face-Centered Cubic (FCC) Lattice

1. **Identify the positions of atoms in the FCC lattice:**
- In an FCC lattice, atoms are located at each of the corners of the cube and at the center of each face.

2. **Count the corner atoms:**
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