Calculate mass equivalent of a photon of electromagnetic light with wavelength 750 nm.

Explanation

To calculate the mass equivalent of a photon of electromagnetic light with a wavelength of 750 nm, we can use the relationship between energy, mass, and wavelength. The mass equivalent of a photon can be derived from its energy using Einstein's equation \(E = mc^2\) and the energy of a photon given by \(E = \frac{hc}{\lambda}\).

### Step-by-Step Solution:

1. **Identify the Given Values**:
- Wavelength (\(\lambda\)) = 750 nm = \(750 \times 10^{-9}\) m
- Planck's constant (\(h\)) = \(6.626 \times 10^{-34}\) J·s
- Speed of light (\(c\)) = \(3 \times 10^8\) m/s
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