If a star's apparent visual magnitude is equal to its absolute visual magnitude, how far is the star located from Earth?
a. 0 pc b. 1 pc
c. 10 pc d. 100 pc
Question 2
An isolated black hole in empty intergalactic space would be difficult to detect because
a. there would be no stars behind it whose light would be affected by gravitational lensing.
b. it could not emit light from inside its event horizon.
c. no companion stars would be affected by its gravitational field.
d. no matter would be falling into it to create an X-ray-emitting accretion disk.
e. All of the other choices are correct.
Apparent Magnitude Scale
A Summary of the Star Formation Process
Patients of all socioeconomic backgrounds should be given equal care.
How to solve inequalities involving absolute values (Part 2)
Magnitude of Geologic Time
Smooth Brittle Star.