In solar cells, a silicon solar cell `(mu = 3.5)` is coated with a thin film
of silicon monoxide `SiO (mu = 1.45)` to minimize reflective losses from the surface.
Determine the minimum thickness of SiO that produces the least reflection at a
wavelength of 550nm, near the centre of the visible spectrum. Assume
approximately normal incidence .

Explanation

To determine the minimum thickness of silicon monoxide (SiO) that minimizes reflective losses at a wavelength of 550 nm, we can follow these steps:

### Step-by-Step Solution:

1. **Identify Given Values**:
- Wavelength of light, \( \lambda = 550 \, \text{nm} = 550 \times 10^{-9} \, \text{m} \)
- Refractive index of silicon (solar cell), \( \mu_1 = 3.5 \)
- Refractive index of silicon monoxide (SiO), \( \mu_2 = 1.45 \)
...