« previous next »

Author Question: Why are nearly all recently built astronomical telescopes reflectors instead of refractors? What ... (Read 124 times)

aabwk4

  • Hero Member
  • *****
  • Posts: 593
on: Jul 27, 2018
Why are nearly all recently built astronomical telescopes reflectors instead of refractors?
 
  What will be an ideal response?

Question 2

An M star is hotter than an O star.
 
  a. True
  b. False
  Indicate whether the statement is true or false


nekcihc358

  • Sr. Member
  • ****
  • Posts: 327
Reply #1 on: Jul 27, 2018
Answer to Question 1

Refracting telescopes suffer from chromatic aberration, which limits their usefulness, whereas reflecting telescopes do not have this problem. The primary lens of a refracting telescope is much more difficult to manufacture than a mirror of the same size, and are more expensive.

Answer to Question 2

False


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.

Did you know?

The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

Did you know?

The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

Did you know?

Addicts to opiates often avoid treatment because they are afraid of withdrawal. Though unpleasant, with proper management, withdrawal is rarely fatal and passes relatively quickly.

Did you know?

Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

The 10-m Keck Telescopes The 10-m Keck Telescopes
A Recently Discovered Member of the Local Group A Recently Discovered Member of the Local Group
The declining age of menarche over the past 150 years has been measured in many European countries, The declining age of menarche over the past 150 years has been measured in many European countries,
In addition to common schools, thousands of female seminaries were built between 1820 and 1850, many In addition to common schools, thousands of female seminaries were built between 1820 and 1850, many
Many former slaves understood that illiteracy was an implement of bondage. The Freedmen’s Bureau bui Many former slaves understood that illiteracy was an implement of bondage. The Freedmen’s Bureau bui
A recently discovered fossil of a missing evolutionary link is shown on the right, and a ... A recently discovered fossil of a missing evolutionary link is shown on the right, and a ...
Video: Dietary Cholesterol & LDL

For a complete list of videos, visit our video library