« previous next »

Author Question: Suppose the laboratory wavelength of a spectral line is 600 nm. In a star it is measured to be 599.4 ... (Read 79 times)

tfester

  • Hero Member
  • *****
  • Posts: 534
on: Jul 27, 2018
Suppose the laboratory wavelength of a spectral line is 600 nm. In a star it is measured to be 599.4 nm. Is the star moving toward or away from us, relative to the line of sight? How fast is it moving? (Hint: c = 300,000 km/s)
 
  a. toward; 300 km/s
  b. away; 300 km/s
  c. at rest; 0 km/s
  d. sideways; 300 km/s
  e. toward; 150 km/s

Question 2

The Sun traces a path along the ecliptic in a period that is longer than 365 days.
 
  a. True
  b. False
  Indicate whether the statement is true or false


Silverbeard98

  • Sr. Member
  • ****
  • Posts: 355
Reply #1 on: Jul 27, 2018
Answer to Question 1

a

Answer to Question 2

True


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

tfester

  • Hero Member
  • *****
  • Posts: 534
Reply #2 on: Jul 27, 2018
Thanks


Silverbeard98

  • Sr. Member
  • ****
  • Posts: 355
Reply #3 on: Jul 27, 2018
Welcome :)


« previous next »
 

Did you know?

To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.

Did you know?

The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.

Did you know?

The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.

Did you know?

Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.

Did you know?

Glaucoma is a leading cause of blindness. As of yet, there is no cure. Everyone is at risk, and there may be no warning signs. It is six to eight times more common in African Americans than in whites. The best and most effective way to detect glaucoma is to receive a dilated eye examination.

Laboratory Mouse Laboratory Mouse
Laboratory mice demonstrate that genetic differences can have profound effects on the propensity to Laboratory mice demonstrate that genetic differences can have profound effects on the propensity to
How to find the distance of any line segment How to find the distance of any line segment
Time Line for Evolution of the Universe Time Line for Evolution of the Universe
A monochromatic beam of light of wavelength 600 nm is incident normally on a diffraction ... A monochromatic beam of light of wavelength 600 nm is incident normally on a diffraction ...
A photon whose wavelength is = 5.0 10-11 m is scattered straight backward. What is the ... A photon whose wavelength is = 5.0 10-11 m is scattered straight backward. What is the ...
Video: Ventilation - phases and driving forces

For a complete list of videos, visit our video library