This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: One of the absorption lines of hydrogen has a rest wavelength of 656 nm (at rest means with respect ... (Read 81 times)

rosent76

  • Hero Member
  • *****
  • Posts: 516
on: Jul 27, 2018
One of the absorption lines of hydrogen has a rest wavelength of 656 nm (at rest means with respect to the observer, like in a lab). You observe several stars and measure the wavelength of this same hydrogen absorption line in each star.
 
  Based on the measured wavelength of this line, which star is moving towards the Earth the fastest?
  A) 670 nm B) 640 nm C) 656 nm D) 630 nm E) 680 nm

Question 2

Which of the following telescopes is best suited for studying the hottest intergalactic gas (10 million K) in a cluster of galaxies?
 
  A) Very Large Array Radio Telescope
  B) Chandra X-ray Telescope
  C) Herschel Infrared Telescope
  D) Hubble Space Telescope (UV and optical and some infrared)


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

ryhom

  • Sr. Member
  • ****
  • Posts: 366
Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

B


rosent76

  • Hero Member
  • *****
  • Posts: 516
Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


ryhom

  • Sr. Member
  • ****
  • Posts: 366
Reply #3 on: Jul 27, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

Did you know?

Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.

Did you know?

The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

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?

IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

Gangrene of the toes and foot as a result of an infection often means eventual amputation. Gangrene of the toes and foot as a result of an infection often means eventual amputation.
Energy Level Diagram of Hydrogen Energy Level Diagram of Hydrogen
Effect of pH on drug absorption: (a) a weak acid such as aspirin (ASA) is in a nonionized form in an Effect of pH on drug absorption: (a) a weak acid such as aspirin (ASA) is in a nonionized form in an
The Small Intestine: A Huge Surface for Digestion & Absorption The Small Intestine: A Huge Surface for Digestion & Absorption
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 ...
Summary of digestion and absorption in the small intestine Summary of digestion and absorption in the small intestine
Video: Electromagnetic Spectrum, Chlorophyll and Pigment & Light

For a complete list of videos, visit our video library