The wavelength of light is 748 nm. What is its wavelength in Å ?

Explanation

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

### Step 1: Understand the conversion factor
We know that:
1 Å = 0.1 nm

### Step 2: Convert nanometers to angstroms
From the conversion factor, we can derive that:
1 nm = 10 Å

### Step 3: Apply the conversion to the given wavelength
Given the wavelength of light is 748 nm, we can convert it to angstroms by multiplying by the conversion factor:
\[ 748 \, \text{nm} \times 10 \, \left(\frac{\text{Å}}{\text{nm}}\right) = 7480 \, \text{Å} \]

### Final Answer
The wavelength of light in angstroms is **7480 Å**.

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