Select the correct answer from the list.(1 point)
As a star's size increases, its luminosity
. As a star's temperature , its luminosity increases
As a star's temperature increases, its luminosity increases.
as a star's temperature increases it's luminosity _.
increases.
Which describe the study of spectroscopy? Select the two correct answers.(1 point)
the number of galaxies
reflection of light by earth
interaction of light and atoms
emission and absorption of light
The correct answers are:
- Interaction of light and atoms
- Emission and absorption of light
As a star's size increases, its luminosity increases.
To select the correct answer, we need to understand the relationship between a star's size, temperature, and luminosity.
A star's luminosity refers to the total amount of energy it emits per unit of time. It is directly related to both the star's size and temperature.
As for the options presented, the first statement in the question suggests that as a star's size increases, its luminosity also increases. The second statement implies that as a star's temperature increases, its luminosity increases.
To determine which statement is correct, let's consider the relationship between these factors.
Size: A star's size refers to its physical dimensions, such as its radius. Generally, larger stars have greater surface areas, which means they can emit more energy, resulting in higher luminosity.
Temperature: A star's temperature is a measure of the average kinetic energy of its particles. Higher temperatures indicate more energetic particles, which can emit more light and thus increase the star's luminosity.
Based on these relationships, we can conclude that the correct statement is: "As a star's size increases, its luminosity increases."