Consider a parallel beam of light of wavelength 600nm and intensity 100W (`m^-2)`. (a) Find the energy and linear momentum of each photon. (b) How many photons cross 1 `cm^2` area perpendicular to the beam in one second?

Explanation

To solve the problem step by step, we will break down the calculations for both parts (a) and (b).

### Part (a): Energy and Linear Momentum of Each Photon

1. **Given Data:**
- Wavelength, \( \lambda = 600 \, \text{nm} = 600 \times 10^{-9} \, \text{m} \)
- Planck's constant, \( h = 6.626 \times 10^{-34} \, \text{Js} \)
- Speed of light, \( c = 3 \times 10^{8} \, \text{m/s} \)
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