Question

which of the following statement is true: (a) if two stars are at the same distance to us, the one with a higher temperature would look brighter (if the interstellar obscuration is the same). (b) the iron in the nails you use to hang pictures on the wall was generated in the core of our sun. (c) iron cannot be generated in the core of our sun, but it can be generated during the supernova before the remnant of the sun becomes a black hole. (d) the fact that rigel (the brightest star in orion) is currently a supergiant of 18 solar masses implies that at the very end of its life it will go supernova.

Answer 1

If two stars are at the same distance to us, the one with a higher temperature would look brighter. From the given options, statement (a) is true.

Step-by-step explanation:

(a) If two stars are at the same distance to us, the one with a higher temperature would look brighter (if the interstellar obscuration is the same). This statement is true. The brightness or luminosity of a star depends on its temperature. Hotter stars emit more energy and therefore appear brighter to us.

(b) The iron in the nails you use to hang pictures on the wall was generated in the core of our sun.

(c) Iron cannot be generated in the core of our sun, but it can be generated during the supernova before the remnant of the sun becomes a black hole.

(d) The fact that Rigel (the brightest star in Orion) is currently a supergiant of 18 solar masses implies that at the very end of its life it will go supernova.

From the given options, statement (a) is true.