« previous next »

Author Question: The main lens or mirror of a telescope is called the ____________________. Fill in the blank(s) ... (Read 61 times)

vicotolentino

  • Hero Member
  • *****
  • Posts: 552
on: Jul 27, 2018
The main lens or mirror of a telescope is called the ___________________ _.
 
  Fill in the blank(s) with correct word

Question 2

Hydrogen Balmer lines are strongest near ____ spectral class whereas ionized Calcium (CaII) lines are strong in ___ stars.
 
  a. A0, K b. O5, M5
  c. M5, G1 d. M0, B0


31809pancho

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

primary lens or mirror

Answer to Question 2

a


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

Did you know?

About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

Did you know?

Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.

Did you know?

Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

Did you know?

Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

Structure of cellulose, the main macromolecule of the primary cell wall Structure of cellulose, the main macromolecule of the primary cell wall
The Largest Refracting Telescope The Largest Refracting Telescope
Blocked at every turn by congressional Republicans who hated him, President Obama turned to techniqu Blocked at every turn by congressional Republicans who hated him, President Obama turned to techniqu
Pablo Picasso, Girl before a Mirror. Pablo Picasso, Girl before a Mirror.
The Z lens, which was developed by Zaidel to study functional asymmetry in split-brain patients. It ... The Z lens, which was developed by Zaidel to study functional asymmetry in split-brain patients. It ...
Hubble Space telescope Hubble Space telescope
Video: Oxygen transport - methods and oxyhemoglobin

For a complete list of videos, visit our video library