Question

You measure the maximum wavelength of the radiation from a star as 547.0 nm, and the...

You measure the maximum wavelength of the radiation from a star as 547.0 nm, and the radius of the star to be 5.1 ×108m×108m. Find the total power emitted by the star in Watts, assuming it is a perfect black-body emitter. Use 2 sf in your answer.

Hint: Use Wien's Law to find the temperature, and then Stefan's Law. You can assume the star is a sphere.

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Suppose a star with radius 8.50 × 108 m has a peak wavelength of 685 nm...
Suppose a star with radius 8.50 × 108 m has a peak wavelength of 685 nm in the spectrum of its emitted radiation. Assume the star is a perfect blackbody. (A) What is the energy of a photon with this wavelength? (B) What is the surface temperature of the star? (C) At what rate is energy emitted from the star in the form of radiation?
We observe a red giant with a luminosity 148 times the Sun's and a wavelength of...
We observe a red giant with a luminosity 148 times the Sun's and a wavelength of maximum radiation of 699 nm. What is its radius? (Use Wien's law, Unit 55, to find its temperature.) Its radius is × 10^10 m.
Thermal radiation: Mostly based on Section 5.4. i) Draw by hand the curves for thermal radiation...
Thermal radiation: Mostly based on Section 5.4. i) Draw by hand the curves for thermal radiation for a star like the Sun and the Earth. The x-axis is wavelength and the y-axis is intensity/power (you do not need to put numbers on your plot). Please explain the dierence in the two curves based on Wien's Law and the Stefan-Boltzman law. ii) The Earth produces thermal radiation at night. Take the temperature at the surface to be 50 F or about...
Astronomers observe a star that exhibits a black body emission spectrum with the maximum radiative emission...
Astronomers observe a star that exhibits a black body emission spectrum with the maximum radiative emission occurring at a wavelength of 500 nm. a. what is the surface temperature of this Star? b. how large is the radiated power of the star if it's area has been measured to be 6.16x10^18 m^2? hint: a=5.67x10^-8 Wm^-2 K^-4
9/ The star Betelgeuse has a wavelength of maximum emission of 923.5 nm, whereas the star...
9/ The star Betelgeuse has a wavelength of maximum emission of 923.5 nm, whereas the star Bellatrix has a wavelength of maximum emission of 131.8 nm. Which star is colder A/ more info B/ Bellatrix C/ Betelgeuse D/ same temperature 10/ Which of the following correctly lists the spectral sequence of stars in order of decreasing surface temperature? A/ O,B,A,F,G,K,M B/ M,K,G,F,A,B,O C/ O,M,K,G,F,B,A D/ A,B,F,G,K,M,O 11/ How is a star assigned its spectral type? A/ The star’s spectrum is...
The emissivity of the human skin is 97.0 percent. Use 35.0 °C for the skin temperature...
The emissivity of the human skin is 97.0 percent. Use 35.0 °C for the skin temperature and approximate the human body by a rectangular block with a height of 1.56 m, a width of 37.5 cm and a length of 31.0 cm. Calculate the power emitted by the human body. Hints: Calculate the total surface area of the body. Convert the body temperature from Celsius to Kelvin. Then use the Stefan-Boltzmann law. Incorrect. Tries 2/12 Previous Tries What is the...
To determine the peak wavelength of the blackbody radiation emitted by a person you would need...
To determine the peak wavelength of the blackbody radiation emitted by a person you would need to know which of the following? Group of answer choices A. The mass of the person. B. The speed of the person. C. The electrical charge on the person. D. The person's body temperature.
Betelgeuse Written Homework The spherical star Betelgeuse has the following properties: peak wavelength = 807 nm...
Betelgeuse Written Homework The spherical star Betelgeuse has the following properties: peak wavelength = 807 nm radius = 6.3E11 m mass = 2.31E31 kg distance to Earth = 6.85E18 m emissivity = 1 Determine the following based on the above information and relevant equations: a) Temperature of the light-emitting surface of Betelgeuse, assumed constant (as an aside, note that there isn't really a single temperature of a star). b) Power of Betelgeuse. c) Intensity of light from Betelgeuse reaching Earth...
The wavelength of peak emission from any star is related to the temperature of its photosphere...
The wavelength of peak emission from any star is related to the temperature of its photosphere (i.e., the emitting surface) by Wien’s Law, given by λ = 2,900/T, where λ is the wavelength in micrometers (1 µm = 10-6 m), and T is the temperature of the star in Kelvin (see textbook’s figure 3.27 for help). Answer the following questions using the above equation. 2.1. The most massive star ever observed is a Wolf-Rayet type-star, named R136a1. It is so...
The star Sirius has a parallax angle of 0.379 arcseconds and its brightness is 8.8 x...
The star Sirius has a parallax angle of 0.379 arcseconds and its brightness is 8.8 x 10^-11 that of the Sun (b Sirius=8.8 x 10^-11bSun). The wavelength of maximum emission of Sirius is 241.7 nm. a) What is Sirius luminosity in terms of solar luminosity? b) And what is Sirius luminosity in Watts? (Assume that the Sun's luminosity is 3.8 x 10^26W) c) What is Sirius surface temperature? d) Use the information above to compute Sirius radius.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT