Chapter 6: Q31E (page 1315)

Laser Surgery. Using a mixture of CO₂, N₂, and sometimes He, CO₂ lasers emit a wavelength of 10.6 µm. At power outputs of 0.100 kW, such lasers are used for surgery. How many photons per second does a CO2 laser deliver to the tissue during its use in an operation?

Short Answer

Expert verified

The number of photons per second is 5.336 x 10²¹ photons/s.

Step by step solution

Given Data

According to de Broglie, Light has dual nature as in some situations it behaves like waves and in others like particles. Electrons, which sometimes exhibits particle nature may also behave like wave in some situations.

When a particle acts like a wave, it carries a wavelength which is known as de Broglie wavelength.

Number photons per second

The energy of one photon is given by

$E_{p h o t o n} = \frac{h c}{λ} = \frac{(6.626 * 10^{- 34} J s) (3 * 10^{8} m / s)}{10.6 * 10^{6} m} = 1.874 * 10^{- 20} J P o w e r = \frac{E n e r g y}{T i m e}$

Thus, number of photons every second is

$E_{b e a m} = n E_{p h o t o n} n = E_{b e a m} / E_{p h o t o n} = \frac{100 J}{1.874 * 10^{- 20} J} = 5.336 * 10^{21} p h o t o n s / s e c$

Therefore, the number of photons per second is 5.336 x 10²¹ photons/s.

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Laser Surgery. Using a mixture of CO₂, N₂, and sometimes He, CO₂ lasers emit a wavelength of 10.6 µm. At power outputs of 0.100 kW, such lasers are used for surgery. How many photons per second does a CO2 laser deliver to the tissue during its use in an operation?

Short Answer

Step by step solution

Given Data

Number photons per second

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Laser Surgery. Using a mixture of CO2, N2, and sometimes He, CO2 lasers emit a wavelength of 10.6 µm. At power outputs of 0.100 kW, such lasers are used for surgery. How many photons per second does a CO2 laser deliver to the tissue during its use in an operation?

Short Answer

Step by step solution

Given Data

Number photons per second

One App. One Place for Learning.

Most popular questions from this chapter

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Study anywhere. Anytime. Across all devices.

Laser Surgery. Using a mixture of CO₂, N₂, and sometimes He, CO₂ lasers emit a wavelength of 10.6 µm. At power outputs of 0.100 kW, such lasers are used for surgery. How many photons per second does a CO2 laser deliver to the tissue during its use in an operation?