Question

A star whose surface temperature is 4000 K has a peak wavelength of 725 nm, according...

A star whose surface temperature is 4000 K has a peak wavelength of 725 nm, according to Wien’s Law. If this star is in the Andromeda Galaxy, which is moving toward Earth at about 120 km/s, what would an observer on Earth see as the peak wavelength for this star?

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
A star has a surface temperature of 4500 K. a. Calculate the peak wavelength of its...
A star has a surface temperature of 4500 K. a. Calculate the peak wavelength of its brightness vs. wavelength curve. [1.5 points] b. What color does this wavelength correspond to? (Note: See p. 5-7 of the textbook for a list of colors corresponding to different wavelength ranges. If the wavelength is in the infrared or ultraviolet range, state “IR” or “UV” as the color.) [0.5 points] c. Now imagine that the star is moving away from us at 0.15c, where...
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...
1. What is the peak wavelength emitted by a star with a surface temperature of 7070...
1. What is the peak wavelength emitted by a star with a surface temperature of 7070 K? Give your answer in nm (1 nm = 10-9 m), but enter only the numerical part in the box. 2. By how much would a star's temperature need to increase in order for its peak wavelength to decrease from 460 to 360 nm? Your answer will be the change in temperature. Give your answer in K, but enter only the numerical part in...
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...
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?
Parallax angle for a star is 195 mas. Its surface temperature is 7500 K and diameter...
Parallax angle for a star is 195 mas. Its surface temperature is 7500 K and diameter of 4 times solar radius. Calculate apparent magnitude , absolute magnitude, luminosity, wavelength of peak emission and flux received on surface of the earth.
Show all calculations and formulas used. The closest star to earth is 4.253 light years away....
Show all calculations and formulas used. The closest star to earth is 4.253 light years away. How far is that in miles? The fastest space probe ever designed has a speed of about 58,000 km/h. How long would it take it to cross the length of the milky way galaxy? If the parallax angle of a star is 0.000075% then how far away is that star? What is the relative brightness of the Sun as seen from Saturn as compared...
A particular star has a radius of 8.58 ✕ 108 m. The peak intensity of the...
A particular star has a radius of 8.58 ✕ 108 m. The peak intensity of the radiation it emits is at a wavelength of 682 nm. (a) What is the energy (in J) of a photon with this wavelength? J (b) What is the star's surface temperature (in K)? (Round your answer to at least the nearest integer.) K (c) At what rate (in W) is energy emitted from the star in the form of radiation? Assume the star is...
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...
A bright star 20 light-years away emits violet light with wavelength of 380 nm as seen...
A bright star 20 light-years away emits violet light with wavelength of 380 nm as seen from the earth. A spaceship is covered with tinanium on its surface, whose work function is 4.3 eV. a) When the spaceship is stationed on earth, determine whether photoelectrons are ejected from the spaceship due to the violet starlight. If so, compute their maximum kinetic energy. b) The spaceship has just departed earth (with negligible travel distance so far) and is flying towards the...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT