What are infrared radiations ? How are they detected ? State one use of these radiations

Explanation

### Step-by-Step Solution

**Step 1: Definition of Infrared Radiations**
Infrared radiations are a type of electromagnetic radiation that has wavelengths longer than visible light but shorter than microwaves. Specifically, they range from approximately 780 nanometers (nm) to 1 millimeter (mm).

**Step 2: Position in the Electromagnetic Spectrum**
In the electromagnetic spectrum, infrared radiations are located to the right of visible light. As we move from left to right in the spectrum, the wavelength increases, and thus infrared radiations have a higher wavelength than visible rays.

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