(a) What is the intensity in W/m of a laser beam used to burn away cancerous tissue that, when 90.0% absorbed, puts 540 J of energy into a circular spot 2.2 mm in diameter in 1.5 s? Hint: The laser is a collimated beam of light and does not produce a spherical wave. w/m2 (b) Reflect on how this intensity compares to the average intensity of sunlight (about 1W/m) and the implications that would have if the laser beam entered your eye. Note how your answer depends on the time duration of the exposure. The intensity of a laser is about damaging if they enter your eye. + times that of the sun, so clearly lasers can be very

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

A:

Q: The Sun has a surface temperature of 5770 K, a radius of 6.96 × 105 km, an average distance from…

A: (a) Surface temperature of earth Since the surface temperature of Earth is constant with time, it is…

Q: What is the surface temperature of Betelgeuse, a red giant star in the constellation of Orion, which…

A: According to Wein’s displacement law, the temperature is given by

Q: The emissivity of the human skin is 97.0 percent. Use 35.0 °C for the skin temperature and…

A: “Since you have asked multiple questions, we will solve the first question for you. If youwant any…

Q: You are working in a shop and are responsible for enacting the CoVID protocols before potential…

A: If a person has a peak wavelength of 9.320 μm, are they allowed to enter the store or not. maximum…

Q: Emergency responders for radioactive material incidents normally use the inverse square law of…

A: The inverse square law states that the intensity of any radioactive source decreaseswith the square…

Q: Light with an average intensity of 1.7 x 106 W/m2 perpendicuarly hits a foil of mass 60 mg and an…

A: The objective of this question is to find the speed of the foil after 15 seconds of exposure to…

Q: The wavelength of maximum intensity of the sun’s radiation is observed to be near 500 nm. Assume the…

A: Surface Temperature of sun can be found out using Wien's displacement law, λmaxT=b where b is the…

Q: What is the intensity in W/m​2​​ of a laser beam used to burn away cancerous tissue that puts 374 J…

A: To determine,The intensity(I) in Wm-2​​ of a laser beam.given,Energy of laser beam(E)=374 Jdiameter…

Q: A uniform beam of laser light has a circular cross section of diameter d = 7.5 mm. The beam’s power…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

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.