A 25 watt bulb emits monochromatic yellow light of wavelength of ` 0. 57 mu` m. Calculate the rate of emission of quanta per second .

Explanation

To solve the problem of calculating the rate of emission of quanta (photons) per second from a 25-watt bulb emitting monochromatic yellow light of wavelength 0.57 µm, we can follow these steps:

### Step 1: Convert Wavelength to Meters
The given wavelength is in micrometers (µm). To use it in calculations, we need to convert it to meters (m).

\[ \text{Wavelength} (\lambda) = 0.57 \, \mu m = 0.57 \times 10^{-6} \, m \]
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