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

Author Question: Dark matter has not been observed at any electromagnetic wavelength. Indicate whether the ... (Read 46 times)

nautica902

  • Hero Member
  • *****
  • Posts: 591
on: Jul 27, 2018
Dark matter has not been observed at any electromagnetic wavelength.
 
  Indicate whether the statement is true or false

Question 2

Explain an advantage a good refractor corrected for chromatic aberration has over any design of reflector of the same size.
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

itsakadoozi

  • Sr. Member
  • ****
  • Posts: 317
Reply #1 on: Jul 27, 2018
Answer to Question 1

TRUE

Answer to Question 2

The lenses of the refractor can transmit more light without any central obstruction due to the secondary mirror, and thus form a shaper, crisper image with better contrast than can the reflector designs.


nautica902

  • Member
  • Posts: 591
Reply 2 on: Jul 27, 2018
Thanks for the timely response, appreciate it

Chelseyj.hasty

  • Member
  • Posts: 319
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

Did you know?

Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

Did you know?

The horizontal fraction bar was introduced by the Arabs.

Did you know?

Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

Did you know?

Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

Brain scans showing the white-matter pathways involved in everyday learning: Brain scans showing the white-matter pathways involved in everyday learning:
Stereo Image taken by NASA STEREO Probes launched in 2006; utilizing two Spacecrafts to image the Su Stereo Image taken by NASA STEREO Probes launched in 2006; utilizing two Spacecrafts to image the Su
Time Slows Down Near Matter Time Slows Down Near Matter
Mapping Dark Matter Mapping Dark Matter
Cortical Gray Matter in Monozygotic Twins Discordant for Schizophrenia Cortical Gray Matter in Monozygotic Twins Discordant for Schizophrenia
Wavelength Wavelength
Video: Skin Cancer

For a complete list of videos, visit our video library