The blackbody radiation emitted from a furnace peaks at a wavelength of 3.4 × 10' -6 m (0.0000034 m). What is the temperature inside the furnace?
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- 25. A photon has a frequency of 1.14 x 10^15 Hz. What is the energy of the photon? Use the formula E = hf, where E is energy in Joules, h is Planck's constant = 6.62 x 10^-34 J/s, and f is frequency (Hz). 5.82 x 10^-49J 8.77 x 10^-16 J 7.55 x 10^-19 J 1.09 x 10^-12 J wwwwww2. * a. A surface at 27 °C emits radiation at a rate of 100 W. At what rate does an identical surface at 54 °C emit radiation? b. Determine the wavelength of the maximum amount of radiation emitted by each surface.5. Calculate the total power radiated per unit area by a tungsten filament at a temperature of 3000. K. (Assume that the filament is an ideal radiator.) (b) If the tungsten filament of a lightbulb is rated at 75.0 W, what is the surface area of the filament? (Assume that the main energy loss is due to radiation.)
- A blackbody is brightest at a wavelength of 800 nm. At what wavelength would the blackbody be brightest if its temperature were tripled?Q20. A certain gas in a closed container at 0.001 atmospheres of pressure is irradiated with ionizing radiation, causing on average one electron to be stripped off each atom. The ionizing radiation also heats the gas from 20°C to 3000°C. The resulting ionized gas ("plasma") behaves like an ideal gas. What is the pressure in the plasma? a. 4.92'103 Pa b. 3.04'105 Pa O c. 1.23'103 Pa d. 2.26'103 Pa Clear my choice4. Assuming a filament in a 100 W light bulb acts as a perfect blackbody (e = 1). what is the temperature of the hottest portion of the filament if it has a surface area of 6.3 105 m²? The Stefan-Boltzmann constant is 5.67 x 10-8 J/(s. m². K*). a) 130.8 K b) 1100.21 K c) 2300.21 K d) 5800.5 K 5. During an evening news broadcast in Helsinki, Finland, the meteorologist indicated that the day's lowest temperature was -6.0 °C. The corresponding value of this temperature on the Fahrenheit scale is ........ a) -7.2 °F b) 4.0 °F c) 21.2 °F d) 25.5 °F