What is the intensity in W/m2 of a laser beam used to burn away cancerous tissue that, when 94.0% absorbed, puts 540 J of energy into a circular spot 2.20 mm in diameter in 4.00 s? Discuss how this intensity compares to the average intensity of sunlight (about 700 W/m2) and the implications it would have if the laser beam entered your eye. Note how your answer depen

Q: If the Kelvin temperature of an object is doubled, the amount of radiant energy emitted each second…

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Q: (b) What is the surface temperature of the star? 4274.3 X K (c) At what rate is energy emitted from…

A: b) The star’s surface temperature can be determined by Wein’s displacement law as, Here, T, b, and…

Q: What is the wavelength of the photon with energy E = 3.1 × 10-16 J. Use the unit of nm for the…

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Q: The intensity of the sunlight reaching the Earth's surface is 1268 W/m2 and the average wavelength…

A: Given:- The intensity of the sunlight reaching the Earth's surface is 1268 W/m2 and the average…

Q: A 100-WW incandescent light bulb has a cylindrical tungsten filament 35.0 cm long, 0.41 mmmm in…

A: The given problem is based on Stefan-Boltzmann law and wine's displacement law. Stefan laws stated…

Q: Townsend 1.21: A certain photodetector can resolve the time of arrival of a photon to within 2. 108…

A: In an anticoincidence experiment, only one of the detectors should receive a signal within a period…

Q: When photons pass through matter, the intensity I of the beam (measured in watts per square meter)…

A:

Q: Two absorption lines in copper have wavelengths of 0.154 nvm and 0.139 nvm. Find the ratio of the…

A: When electrons of high energy strikes  on the metallic anode of an x -ray tube ,x -rays with a…

Q: Suppose someone is running a fever of 102.0° F (average being 98.6° F). How much more power (in…

A: The intensity of the radiation emitted by a hot body can be given by Stefan Boltzmann law as, Here,…

Q: The human eye can barely detect a star whose intensity at the earth’s surface is 1.6 x 10-11 W/m2.…

A: The energy at the human eye with the given intensity, E1=IAt=I4πr2t   Substitute, E1=1.6×10-11…

Q: The naked eye can detect a stellar object of sixth magnitude in the night sky. With binoculars, we…

A: Given data: The brightness of the 30th magnitude star is B30=2×10-20 W/m2.  The area of the Hubble…

Q: The work function for a certain sample is 2.3 eV. The stopping potential for electrons ejected from…

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Q: Answer the following. (a) What is the surface temperature of Betelgeuse, a red giant star in the…

A: Write the expression for Wien's displacement law. λmaxT=bλmaxT=2898 μm⋅K Here, λmax is the peak…

Q: A rectangular metal plate measures 0.16 m long and 0.9 m wide. The plate is heated to a temperature…

A: The temperature of the plate T=2033 K The area of the plate A=0.16 m×0.9 m=0.144 m2 The Stefan's…

Q: rties of blackbody radiation had been ished. First, the total intensity I (the ge rate of radiation…

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Q: A black body radiates energy, the highest intensity radiation is at a wavelength of 164 nm. What is…

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Q: The intensity of blackbody radiation peaks at a wavelength of 583 nm. (a) What is the temperature…

A: The wavelength of the radiation is 583 nm.

Q: A 2.8-cm-diameter metal sphere is glowing red, but a spectrum shows that its emission spectrum peaks…

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Q: A copper cylinder with a temperature of 397 K is found to emit 199 J of energy each second. If the…

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Q: When a powerful laser is employed in the Earth's atmosphere, the accompanying electric field may…

A: Given:Electric breakdown of dry air happens at, Eo = 3.00 MV/m = 3.00×106  V/mdiameter of the…

Q: Find the energy (in eV) of a photon with a frequency of 1.5 x 1016 Hz. eV Need Help? Read It

A:

Q: A rectangular metal plate measures 0.32 m long and 0.9 m wide. The plate is heated to a temperature…

A:

Q: 3.24 A 3.0-V flashlight bulb draws (0,25 A, converting about 1.0% of the dissipated power into light…

A: Given

Q: The Sun has a temperature of approximately 5800 K. a) What is the peak wavelength of light emitted…

A: We are authorized to answer three subparts at a time, since you have not mentioned which part you…

Q: you are sitting at a desk in a completely dark room. the room is at normal indoor room temperature.…

A: Assume the room temprerature is standard 20°C or 293 K

Q: When a powerful laser is employed in the Earth's atmosphere, the accompanying electric field may…

A: CONCEPT:

Q: Calculate the average wavelength associated with an 150.0 lb athlete who covers 115 m in minute.

A: Given,Speed of athlete, v = 115 m/min = 1.91 m/sMass of athlete, m = 150 lb = 68.03 kg

Q: During a photo electric effect experiment, life possessing 2.56 eV of energy is incident on the…

A: Given data :  Incident energy (Ei) = 2.56 eV Work function (Φ) = 0.250 eV Kinetic energy (KE) =?

Electromagnetic Waves

Electromagnetic waves are waves that consist of magnetic field and electric field components perpendicular to each other. These field components are also perpendicular to the direction of propagation of the wave.