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Electromagnetic radiation with a wavelength of 641 nm appears as orange light to the human eye. The energy of one photon of this light is 3.10 × 10−19 J. Thus, a laser that emits 1.3×10−2 J of energy in a pulse of light at this wavelength produces ________ photons in each pulse.

Respuesta :

Answer:

4.19×10¹⁶

Explanation:

λ = Wavelength = 641 nm

E = Energy of one photon = 3.1×10⁻¹⁹ J

Energy of laser = 1.3×10⁻² J

n = Number of photons

Energy of laser = n×Energy of one photon

[tex]\\\Rightarrow n=\frac{\text{Energy of laser}}{\text{Energy of one photon}}\\\Rightarrow n=\frac{1.3\times 10^{-2}}{3.1 \times 10^{-19}}\\\Rightarrow n=4.19\times 10^{16}[/tex]

Number of photons is 4.19×10¹⁶.

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