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 38 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

alvinum

  • Member
  • Posts: 317
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

Did you know?

There are more nerve cells in one human brain than there are stars in the Milky Way.

Did you know?

Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.

Did you know?

During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.

Did you know?

Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.

Amsterdam Albatross - Adult in flight, showing dark plumage typical of the species. Amsterdam Albatross - Adult in flight, showing dark plumage typical of the species.
Mars sketched as observed by Lowell sometime before 1914. (South top) Mars sketched as observed by Lowell sometime before 1914. (South top)
Fear of dark Fear of dark
The basal ganglia are clusters of gray matter that control learned movement and are involved with ... The basal ganglia are clusters of gray matter that control learned movement and are involved with ...
Which one is more healthier? DARK, MILK or WHITE chocolate Which one is more healthier? DARK, MILK or WHITE chocolate
Gray Matter vs. White Matter Gray Matter vs. White Matter
Video: Deglutition

For a complete list of videos, visit our video library