Give the range of wavelength of the electromagnetic waves visible to us.

Answer

To find the range of wavelengths of electromagnetic waves that are visible to us, we can follow these steps:

### Step-by-Step Solution

1. **Understand the Electromagnetic Spectrum**: The electromagnetic spectrum includes all types of electromagnetic radiation, which ranges from radio waves with long wavelengths to gamma rays with very short wavelengths.

2. **Identify the Visible Spectrum**: The visible spectrum is the portion of the electromagnetic spectrum that can be detected by the human eye. It is a small part of the entire spectrum.

3. **Determine the Wavelength Range**: The wavelengths of visible light are typically measured in nanometers (nm). The range of wavelengths that are visible to the human eye is approximately from 400 nm to 700 nm.

4. **Convert Units if Necessary**: Sometimes, wavelengths might be expressed in different units. For example, 1 nanometer (nm) is equal to \(10^{-9}\) meters. However, in this case, we can keep the answer in nanometers.

5. **State the Final Answer**: Therefore, the range of wavelengths of electromagnetic waves visible to us is from 400 nm to 700 nm.

### Final Answer
The range of wavelengths of the electromagnetic waves visible to us is approximately **400 nm to 700 nm**.

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