The sodium falme testhas a characteristic yellow colour due to the emission of a vavelength of `589 nm ` What is the mass equivalent of one photon of this wavelength of this wavelength

Explanation

To find the mass equivalent of one photon of a wavelength of 589 nm, we can use the relationship between wavelength, mass, and velocity as described by de Broglie's equation. Here’s a step-by-step solution:

### Step 1: Convert Wavelength from Nanometers to Meters
The wavelength given is 589 nanometers (nm). To convert this to meters (m), we use the conversion factor \(1 \text{ nm} = 10^{-9} \text{ m}\).

\[ \text{Wavelength} (\lambda) = 589 \text{ nm} = 589 \times 10^{-9} \text{ m} \]
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