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- 2. The wavelength of maximum intensity of the sun's radiation is observed to be near 500 nm. Assume the sun to be a black-body and calculate,imsed of (a) the sun's surface temperature (b) the power per unit area (intensity) emitted from he sun's surface. (c) At what rate is the sun losing mass in units of kg/s? (Hint: What are the units from rignslavaw wert odrai Jari W (d) your answer in part (b)?) (d) At that rate, how much time would it take to exhaust the sun's fuel supply? Does your answer seem reasonable? (The sun's mass is ~2.0x1030 kg)April May Tmos sbien 3 2022 during I hr the bobal amount of energy & radiated by the sun is 1.348 × 10 30 j. Given that the power radiated by the sun, Pgun is equal to the name of ab which energy is radiated by the Sun, wribe down the relationship between the bobal energy Egun radiated during about alamet, Psun. Use in 1 and the rachabed perver your answer to 3 Significant figures. Urubs are important so bate particular Care bo use umbs consisbanbly throughoutb). Tuo dentical traveling in stima > interfer ith dnfblitude 9.4mm, what wd ves Parch with omplitid e of g.9 mm scme discation chol melium elong etsetchel Cach other. f desultant weve has is phase differn ce b/w two Wolves?
- b). Tuo dlentical traveling in stinazinterfer with Cach other. f Jesultant weive hes wd ves Parch with cmplitid e of g.9 mm some diseation chol melium along stoetchel 9.4mm, what is phase di fferen ce b/ew two Wolves?Colorimetry Honework! s You place 6 bottles of water, ea ch stacting at 25°C into ice chest. Let each an mags of soo. You then 10 hag gel cooling pack, initial tempecature is into phe ice chest. After waiting some fime, what will be the fieal equilibriua temnp ereture of the System? Let Co:4186 1G bettle have place ce whese O'CAs2. A planet orbits a red dwarf star of radius r0 at a distance of 120r0. In- telligent beings on this planet observe that the radiation from their star arriving at the top of their atmosphere is 1100W/m2. Assume the star’s radiation follows Planck’s law for black body radiation. a) What is the temperature of the star’s surface, within 10K accuracy? b) What is the color of the star’s light? This would correspond to the frequency at which the function B(ν, T) is maximal.
- The conerence lengthof on ordinary white lignt source Can be increased It we Place a culor HIter in tront ot the source, S0 thai the 11gnt that passes through filter Is somewhat mnOchroma16. Ihe minimum wave length Of the emerging lignt Is 64Fnm.wha9 is the maximum wavelengtn in order tor the conerene Tength to be 0.1060 mm? the1.You are on an interstellar mission from the Earth to the 8.7 light-years distant star Sirius. Yourspaceship can travel with 70% the speed of light and has a cylindrical shape with a diameter of6 m at the front surface and a length of 25 m. You have to cross the interstellar medium with anapproximated density of 1 hydrogen atom/m3.(a) Calculate the time it takes your spaceship to reach Sirius.(b) Determine the mass of interstellar gas that collides with your spaceship during the mission.Note: Use 1.673 × 10−27 kg as proton mass.The blackbody radiation emitted from a furnace peak at a wavelength of 5.0 10-6 m (0.0000050 m). What is the temperature inside the furnace? K
- A perfect black body has its surface temperature 27 cº Determine : Maximum radiation wavelength? Black body radiation intensity? The rate of energy released from 2m² Tungsten wire had its radiating surface area 8mm² and its temperature 2100K, considering that the wire is an ideal black body, Calculate the energy that the wire radiates in 10 minutes. Suppose the surface temperature of the Sun were about 12,000K, rather than 6000K. a. How much more thermal radiation would the Sun emit? b. What would happen to the Sun's wavelength of peak emission? c. Do you think it would still be possible to have life on Earth? Explain /A The energy radiated by a black body at 2300K is found to have the maximum at a wavelength 1260 nm, its emissive power being 8000W/m2. When the body is cooled to a temperature T K, the emissive power is found to decrease to 500W/m2. Find : (i) the temperature T k (ii) the wave length at which intensity of emission in maximum at the Te / Black body becomes yellow with λ…8. Convert 125 miles/h to km/s Thr_ Go sec 125 mil hours =0.05588 . A 55.9g object that occupies 7.25mL vwould have what density?The most massive stars in the Universe have a surface temperature that can reach over 50 000 K. Life on planets like Earth cannot exist at 1AU from such stars, it's too hot. Find the emitted power per square meter of peak intensity for a similar star with 43000 K that emits thermal radiation. Express your answer to two significant figures.