A laser is used in eye surgery to weld a detached retina back into place. The wavelength of the laser beam is 581 nm, and the power is 1.5 W. During surgery, the laser beam is turned on for 0.050 s. During this time, how many photons are emitted by the laser?

Respuesta :

The laser beam emits 1.939 x 10¹⁷ photons after being activated for 0.050 seconds.

Explain what a laser is.

A laser emits an extremely focused beam of energy that may be used in a variety of equipment and technologies. Laser Amplification by Stimulation of Radiation Emission is what the letters in the term laser stand for. Light Amplifier by Stimulated Radiation Emission is what the elements in the term laser stand for.

Briefing:

As we are aware,

This pace of energy is equivalent to power in numbers.

As things evolve throughout time,

using mathematics,

power : P = E /t

Total Energy : E = P t

= (1.5)(0.050)

= 0.075 J

The laser beam's wavelength is = λ = 514 nm

One photon's energy is given by E ' = h c /λ

= (6.626068 × 10⁻³⁴ )(3 x 10⁸)/(514 x10⁻⁹)

= 0.03867 x 10⁻¹⁷ J

The amount of photons the laser beam emits:

= (total energy) / (energy per photon)

= 0.075 J / 0.03867 x 10⁻¹⁷ J

= 1.939 x10¹⁷ photons

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