Answered: 4. Find the magnifying power (M) and…

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I hope you answer all of the questions:)

4. Find the magnifying power (M) and the length (L) of a simple telescope with 30-inches focal length of the objective and 2 inches focal length of the eyepiece.

a. M= 15 in; L= 28 in

b. M= 15x; L= 32 in

c. M= 1/15 in; L= 32 in

d. M= 60 x; L=28 in

e. M= 15 in; L= 32 in

5. How would you calculate the difference in brightness between a magnitude of -3 (Star A) and a magnitude of +1 (Star B)?

a. 2.512 X 2.512 X 2.512

b. 2.512

c. 2.512 X 2.512

d. 2.512 X 2.512 X 2.512 X 2.512 X 2.512

e. 2.512 X 2.512 X 2.512 X 2.512

6. The question is in the image:)

The letter e is cut so I'll just put it here:

e. Star F and Star G have the same temperature.

7. If a star begins its evolution with 10 times the mass of the Sun, but ends with 2 times the mass of the sun, what type of object does it form?

a. white dwarf

b. nebula

c. supergiant star

d.neutron star

e. blackhole

9. If two stars have the same luminosity, the cooler star must have a ______________.

a. larger diameter

b. longer distance

c. greater mass

d. bluer color

e. smaller radius

9. In what way is a refracting telescope better than a human eye?

a. It gathers and magnifies an image better using either a mirror or lens.

b. It focuses light and heat energies from the distant galaxies.

c. It collects more radio waves from space than the eye can.

d. It collects and magnifies an image through a series of mirrors.

e. It gathers and focuses light from much greater distances.

10. Light year is the distance travelled by light in one year. How many meters are there in 1light-year?

a. 9.46 x 10^9 m

b. 9.46 x 10^20 m

c. 9.46 x 10^12 m

d. 9.46 x 10^18 m

e. 9.46 x 10^15 m

11. Of the following beliefs, events or advancements that occur in the timelineof astronomy, which one occurs in the MODERN astronomy?

a. Galileo's use of telescopes

b. Perfectly spherical earth and orbits

c. Kepler's Laws of Planetary Motion

d. Einstein's theory of general relativity

e. Ptolemy's book the Almagest.

12. Sirius is 8.6 light years from Earth. If Femy who is celebrating her debut sees this star tonight, how old was she when the light left Sirius on its journey to her?

a. 9.4 years old

b. 2.6 years old

c. 10.6 years old

d. 1.4 years old

e. 26.6 years old