« previous next »

Author Question: The main lens or mirror of a telescope is called the ____________________. Fill in the blank(s) ... (Read 58 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?

Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

Did you know?

The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.

Did you know?

Patients should never assume they are being given the appropriate drugs. They should make sure they know which drugs are being prescribed, and always double-check that the drugs received match the prescription.

Did you know?

Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.

Did you know?

Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.

Eighteen-year-olds were the largest age cohort in the first year of the war in both armies. Soldiers Eighteen-year-olds were the largest age cohort in the first year of the war in both armies. Soldiers
The two main types of nerve cells. The two main types of nerve cells.
H.M.’s Mirror Tracing Task H.M.’s Mirror Tracing Task
Galileo Telescope. Galileo Telescope.
Main Theoretical Traditions in Sociology Main Theoretical Traditions in Sociology
Telescope Telescope
Video: Immune responses Animation

For a complete list of videos, visit our video library