We can reasonably model a 75 W incandescent light bulb as a sphere 6.0 cm in diameter. Typically, only about 5% of the energy goes to visible light; the rest goes largely to non- visible infrared radiation. (a) What is the visible-light intensity (in W>m 2 ) at the surface of the bulb? (b) What are the amplitudes of the electric and magnetic fields at this surface, for a sinusoidal wave with this intensity?
Answers: 2
Another question on Physics
Physics, 22.06.2019 10:30
An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.
Answers: 2
Physics, 22.06.2019 11:20
Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10^−2 cm , mounted coaxially within a cylindrical anode with a radius of 0.5580 cm . the potential difference between the anode and cathode is 260 v . an electron leaves the surface of the cathode with zero initial speed (v initial=0). find its speed vfinal when it strikes the anode.
Answers: 1
Physics, 23.06.2019 01:20
Question 1 of 15 2 points when doing science as inquiry, you should have some idea of what you think the final result will be. o a. true o b. false submit
Answers: 1
You know the right answer?
We can reasonably model a 75 W incandescent light bulb as a sphere 6.0 cm in diameter. Typically, on...
Questions
Chemistry, 31.01.2020 14:49
Mathematics, 31.01.2020 14:49
Social Studies, 31.01.2020 14:50
History, 31.01.2020 14:50
Mathematics, 31.01.2020 14:50
Social Studies, 31.01.2020 14:50
Mathematics, 31.01.2020 14:50
Mathematics, 31.01.2020 14:50
Computers and Technology, 31.01.2020 14:50
