Question

choose correct answer. no explanation needed

QUESTION 36 What does the apparent magnitude of a star tell us about that star? its mass how bright it appears from Earth its radius how much energy it is emitting QUESTION 37 What is the reason sunspots appear darker than surrounding regions on the Sun's surface? They actually are fairly bright, but appear dark against the even brighter background of the surrounding photosphere. They are too cold to emit any visible light. They are extremely hot and emit all their radiation as X-rays rather than visible light. They are holes in the solar surface through which we can see through to deeper, darker layers of the Sun QUESTION 38 Where does the dark matter in our galaxy reside? o spread throughout the halo of the galaxy in the massive black hole at the galactic center in small, compact objects in the halo of the galaxy spread throughout the disk in the form of neutral hydrogen

Answer 1

(36)

The apparent magnitude of a celestial object, like a star is the brightness measured by an observer at the defined distance from the object.

The greater the distance between the observer and object, the smaller the apparent brightness or vice versa.

The apparent magnitude tell about its mass

Generally, the apparent magnitude for the star given by,

m = -2.5logf +constant

Here, f is flux and the quantity (-2.5) depends on the star.

Thus, first option is correct.