State the reason, why GaAs is most commonly used in making of a solar cell.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Material**: Gallium Arsenide (GaAs) is a semiconductor material that is widely used in the production of solar cells.

2. **Absorption Coefficient**: One of the key properties of GaAs is its absorption coefficient. The absorption coefficient is a measure of how well a material can absorb light. A higher absorption coefficient means that the material can absorb more energy from incident solar radiation.

3. **Energy Absorption**: GaAs has a relatively higher absorption coefficient compared to other materials commonly used in solar cells, such as silicon. This means that GaAs can effectively convert a larger portion of the solar energy into electrical energy.

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