« previous next »

Author Question: The main lens or mirror of a telescope is called the ____________________. Fill in the blank(s) ... (Read 55 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?

About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.

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?

Less than one of every three adults with high LDL cholesterol has the condition under control. Only 48.1% with the condition are being treated for it.

Did you know?

Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Spider's main organs Spider's main organs
Cataract. When the pupil is dilated, an abnormal opacity or whiteness of the lens can be observed in Cataract. When the pupil is dilated, an abnormal opacity or whiteness of the lens can be observed in
Lens Lens
Alternative methods for locating the CPT Main Term. Alternative methods for locating the CPT Main Term.
Targeting female fetuses for abortion has become a main issue of the emerging feminist movement in ... Targeting female fetuses for abortion has become a main issue of the emerging feminist movement in ...
This red gasoline container holds about 30 gallons of gasoline and is used to fill vehicles used ... This red gasoline container holds about 30 gallons of gasoline and is used to fill vehicles used ...
Video: Structures that affect circulation - kidneys, blood volume and venous tone

For a complete list of videos, visit our video library