Say true or false:
Radiation is the fastest mode of heat transfer.

Explanation

**Step-by-Step Solution:**

1. **Understanding Heat Transfer Modes**:
- There are three primary modes of heat transfer: conduction, convection, and radiation. Each mode operates under different principles and conditions.

2. **Defining Radiation**:
- Radiation is the transfer of heat in the form of electromagnetic waves. It does not require a medium to travel, which means it can occur in a vacuum.

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