A monochromatic source emitting light of wavelength, 600nm, has a power output of 66W. Caculate the number of photons emitted by this source in 2minuts. Use `h=6.6xx10(-34)Js`.

Explanation

To solve the problem of calculating the number of photons emitted by a monochromatic source in 2 minutes, we can follow these steps:

### Step-by-Step Solution:

1. **Convert Wavelength to Meters**:
The wavelength of light is given as 600 nm. We need to convert this to meters.
\[
\text{Wavelength} (\lambda) = 600 \, \text{nm} = 600 \times 10^{-9} \, \text{m}
...