Calculate the number of photons emitted per second by a 10 W sodium vapour lamp. Assume that 60% of the consumed energy is converted into light. Wavelengths of sodium light =590nm.

Explanation

To solve the problem of calculating the number of photons emitted per second by a 10 W sodium vapor lamp, we will follow these steps:

### Step 1: Calculate the energy converted to light
Given that 60% of the consumed energy is converted into light, we first calculate the energy emitted per second as light.

\[ \text{Power of lamp} = 10 \, \text{W} \]
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