A laser used in eye surgery emits a 2.20-mJ pulse in 1.00 ns, focused to a...
A laser used in eye surgery emits a 2.20-mJ pulse in 1.00 ns, focused to a spot 45.0 µm in diameter on the retina.
(a) Find (in SI units) the power per unit area at the retina.
(This quantity is called the irradiance.)
W/m2
(b) What energy is delivered per pulse to an area of molecular size
(say, a circular area 0.400 nm in diameter)?
J
Homework Answers
Add Answer to:
A laser used in eye surgery emits a 2.20-mJ pulse in 1.00 ns,
focused to a...
In laser eye surgery, the laser emits a 1.14-ns pulse focused on a spot that is...
In laser eye surgery, the laser emits a 1.14-ns pulse focused on a spot that is 31.5 μm in diameter. A) If the energy contained in the pulse is 2.60 mJ, what is the power per square meter (the irradiance) associated with this beam? [I=__W/m2] B) Suppose a molecule with a diameter of 0.400 nm is irradiated by the laser beam. How much energy does the molecule receive in one pulse from the laser? (The energy obtained in this part...
In laser eye surgery, the laser emits a 1.22-ns pulse focused on a spot that is 28.9 um in diameter.
In laser eye surgery, the laser emits a 1.22-ns pulse focused on a spot that is 28.9 um in diameter. Part A If the energy contained in the pulse is 2.84 mJ, what is the power per square meter (the irradiance) associated with this beam? Part B Suppose a molecule with a diameter of 0.634 nm is irradiated by the laser beam. How much energy does the molecule receive in one pulse from the laser? (This much energy is likely to dissociate the molecule.
In laser eye surgery, the laser emits a 1.49-nspulse focused on a spot that is 33.0...
In laser eye surgery, the laser emits a 1.49-nspulse focused on a spot that is 33.0 μm in diameter. Part A If the energy contained in the pulse is 2.85 mJ, what is the power per square meter (the irradiance) associated with this beam? Express your answer to three significant figures. I = W/m2 Part B Suppose a molecule with a diameter of 0.500 nm is irradiated by the laser beam. How much energy does the molecule receive in one...
An Nd-YAG (lambda = 1064nm) laser used in eye surgery emits a 1.00mJ pulse in 1.00...
An Nd-YAG (lambda = 1064nm) laser used in eye surgery emits a 1.00mJ pulse in 1.00 microsecond. The laser beam has a diameter of 2mm. The focusing system of the eye has a focal length of about f=20mm. a)Find the power density (in W/m2) on the cornea of the eye during one pulse. b) Find the power density (in W/m2) delivered to the retina by one pulse.
LASIK eye surgery uses pulses of laser light to shave off tissue from the cornea, reshaping...
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 11 ns and contains 1.3 mJ of light energy. What is the power of one laser pulse? During the very brief time of the pulse, what is the intensity of the light wave?
LASIK eye surgery uses pulses of laser light to shave off tissue from the cornea, reshaping...
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 10 ns and contains 2.0 mJ of light energy. Part A) What is the power of one laser pulse? Express your answer with the appropriate units. Part B) During the very brief time of the pulse, what is the intensity of the light wave?...
LASIK eye surgery uses pulses of laser light to shave off tissue from the cornea, reshaping...
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 12 ns and contains 1.8 mJ of light energy. What is the power of one laser pulse? Express your answer to two significant figures and include the appropriate units. P = During the very brief time of the pulse, what is the intensity of...
(60) 2. The Nd:YAG laser is used in eye surgery called posteriour capsulotomy, following cataract surgery,...
(60) 2. The Nd:YAG laser is used in eye surgery called posteriour capsulotomy, following cataract surgery, to correct cloudiness that affects vision. The laser emits light with a wavelength of 1064 nanometers (nm) in the infrared region of the electro-magnetic spectrum. Each laser pulse has 40.5 J of energy, contains many photons, and the pulse lasts for 30.5 nanoseconds (ns). (15) 2a. Determine the frequency of the 1064 nm Nd:YAG light. (15) 2b. Determine the energy of each photon (J/photon)...
LASIK eye surgery uses pulses of laser light to shave off tissue from the cornea, reshaping it
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 10 ns and contains 1.0 m.J of light energy. You may want to review (Pages 484 - 485) . Part A What is the power of one laser pulse? Part B During the very brief time of the pulse, what is the intensity of the light wave?
LASIK eye surgery uses pulses of laser light to shave off tissue from the cornea, reshaping...
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 20ns and contains 1.7mJ of light energy. What is the power of one laser pulse? During the very brief time of the pulse, what is the intensity of the light wave?
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 12 ns and contains 1.8 mJ of light energy. What is the power of one laser pulse? Express your answer to two significant figures and include the appropriate units. P = During the very brief time of the pulse, what is the intensity of...
Most questions answered within 3 hours.
-
Aqueous hydrobromic acid HBr reacts with solid sodium hydroxide
NaOH to produce aqueous sodium bromide NaBr...
asked 6 minutes ago -
You dissolve 1.0 mole of a substance in water to a total volume
of 1,000 ml....
asked 10 minutes ago -
A company's total assets at the end of last year were 500,000
and its EBIT was...
asked 15 minutes ago -
Is it redundant to say that a pure substance is homogeneous, or
can it not be...
asked 19 minutes ago -
Already famous by the time he arrived at Princeton University in
1933, Einstein had suggested a...
asked 37 minutes ago -
Suppose the average male brain weight (in grams) is estimated to
be 13201320 grams. A 1905...
asked 46 minutes ago -
For each molecular substance (a) H3PO2 and (b) C6H5NH2,
calculate its molecular mass and write a...
asked 39 minutes ago -
The inheritance of color blindness in humans is due to a
recessive gene located on the...
asked 42 minutes ago -
Aqueous sulfuric acid (H2SO4) reacts with solid sodium hydroxide
(NaOH) to produce aqueous sodium sulfate (Na2SO4)...
asked 44 minutes ago -
QUESTION 25:
Find the pure binary representation of the following decimal
value: You DO NOT need...
asked 47 minutes ago -
The English mathematician John Kerrich tossed a coin
10,000 times and obtained 5067 heads.
a. calculate...
asked 1 hour ago -
13. Use the Student's t-distribution to find the t-value for
each of the given scenarios. Round...
asked 1 hour ago