Chapter 38: Q 12 (page 1114)

For what wavelength of light does a 100 mW laser deliver $2.50 \times 10^{17}$ photons per second?

Short Answer

Expert verified

Wavelength of light is 497 nm.

Step by step solution

Step 1. Given information is :100 mW laser is delivering 2.50×1017photons per second.

We need to find out the wavelength of light.

Step 2. Using the expression of energy of photon

$E_{p h} = \frac{P}{R} E_{p h} = \frac{h c}{λ} \frac{h c}{λ} = \frac{P}{R} λ = \frac{h c R}{P} λ = \frac{(6.63 \times 10^{- 34}) (3 \times 10^{8} m / s) (2.50 \times 10^{17})}{(100 \times 10^{- 3} W)} λ = 497 n m$

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For what wavelength of light does a 100 mW laser deliver $2.50 \times 10^{17}$ photons per second?

Short Answer

Step by step solution

Step 1. Given information is :100 mW laser is delivering 2.50×1017photons per second.

Step 2. Using the expression of energy of photon

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For what wavelength of light does a 100 mW laser deliver 2.50×1017photons per second?

Short Answer

Step by step solution

Step 1. Given information is :100 mW laser is delivering 2.50×1017photons per second.

Step 2. Using the expression of energy of photon

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Physics Textbooks

Radiation

Classical Mechanics

Nuclear Physics

Wave Optics

Dynamics

Fluids

Study anywhere. Anytime. Across all devices.

For what wavelength of light does a 100 mW laser deliver $2.50 \times 10^{17}$ photons per second?