Find the energy stored in a 60 cm length of a laser beam operating at 4 m W.

Explanation

To find the energy stored in a 60 cm length of a laser beam operating at 4 mW, we can follow these steps:

### Step 1: Convert Length to Meters
The length of the laser beam is given as 60 cm. We need to convert this to meters for consistency with the speed of light.

\[ \text{Length} = 60 \, \text{cm} = 0.60 \, \text{m} \]
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