The wavelength of light is 786 nm. What is its wavelength in Å ?

Explanation

To convert the wavelength of light from nanometers (nm) to angstroms (Å), follow these steps:

### Step-by-Step Solution:

1. **Understand the Conversion Factor**:
- We know that 1 angstrom (Å) is equal to 0.1 nanometers (nm).
- This means that 1 nm is equal to 10 Å.

2. **Given Wavelength**:
- The wavelength of light is given as 786 nm.

3. **Convert Nanometers to Angstroms**:
- To convert 786 nm to angstroms, we use the conversion factor we identified:
\[ \text{Wavelength in Å} = \text{Wavelength in nm} \times 10 \]
- Substituting the given value:
\[ \text{Wavelength in Å} = 786 \, \text{nm} \times 10 = 7860 \, \text{Å} \]

4. **Final Result**:
- Therefore, the wavelength of light in angstroms is 7860 Å.

### Final Answer:
The wavelength of light is 7860 Å.

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