Energy Carried by Electromagnetic Waves Video Lessons

Concept

# Problem: LASIK eye surgery uses pulses of laser light to shave off tissue from the cornea, reshaping it. A typical LASIK laser emits a 1.0-mm-diameter laser beam with a wavelength of 193 nm. Each laser pulse lasts 16 ns and contains 1.6 mJ of light energy.Part A. What is the power of one laser pulse?Express your answer to two significant figures and include the appropriate unitsPart B. During the very brief time of the pulse, what is the intensity of the light wave?Express your answer to two significant figures and include the appropriate units

###### FREE Expert Solution

Power:

$\overline{){\mathbf{P}}{\mathbf{=}}\frac{\mathbf{E}}{\mathbf{t}}}$, where E is energy and t is time.

Intensity:

$\overline{){\mathbf{I}}{\mathbf{=}}\frac{\mathbf{P}}{\mathbf{A}}}$, where P is power and A is the area covered by the laser beam.

Part A

We're given:

E = 1.6 mJ = 1.6 × 10-3 J

96% (154 ratings)
###### Problem Details

LASIK eye surgery uses pulses of laser light to shave off tissue from the cornea, reshaping it. A typical LASIK laser emits a 1.0-mm-diameter laser beam with a wavelength of 193 nm. Each laser pulse lasts 16 ns and contains 1.6 mJ of light energy.

Part A. What is the power of one laser pulse?
Express your answer to two significant figures and include the appropriate units

Part B. During the very brief time of the pulse, what is the intensity of the light wave?
Express your answer to two significant figures and include the appropriate units

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Energy Carried by Electromagnetic Waves concept. You can view video lessons to learn Energy Carried by Electromagnetic Waves. Or if you need more Energy Carried by Electromagnetic Waves practice, you can also practice Energy Carried by Electromagnetic Waves practice problems.