# what factor affects the luminosity of a star

As the size of a star increases, luminosity increases. If you think about it, a larger star has more surface area. That increased surface area allows more light and energy to be given off. Temperature also affects a star’s luminosity.

• The apparent brightness (magnitude) of a star depends on its luminosity, which is an intrinsic magnitude of the star, and on its distance from us.
• ## What factors influence the luminosity of a star?

What properties determine the intrinsic power output or luminosity of a star? Temperature and size of the star. This relationship helps account for the huge range of stellar luminosities.

## What are three factors that affect luminosity?

Three factors control the brightness of a star as seen from Earth: how big it is, how hot it is, and how far away it is. Magnitude is the measure of a star’s brightness.

## What two factors affect the brightness of a star?

The apparent brightness of a star depends on both its luminosity and its distance from Earth.

## What two factors does the luminosity depend on?

Factors:The size of the star: The larger a star is, the more energy it puts out, and the more luminous it is.The temperature of the star: If two stars are of the same size but have different temperatures, then the star with a higher temperature will be more luminous than the star with lower temperatures.

## What are the factors affecting the brightness of light?

The brightness of a lightbulb is given by its power. P = I2R, and so brightness depends on current and resistance. If the bulbs are identical, they have the same resistance. They may not, however, experience the same current.

## What 3 things does the brightness of a star depend on?

The apparent brightness of a star is measured by its apparent magnitude, taking into account its luminosity, distance from Earth and the change in its light as it passes through Earth’s atmosphere.

## What two factors does the luminosity of a star depend on?

The Luminosity of a star (the total energy emitted per second) depends on two quantities: The “Effective Temperature” of the stellar photosphere, T. The total surface area of the star, which depends on its radius, R.

## What two factors does the luminosity depend on?

Factors:The size of the star: The larger a star is, the more energy it puts out, and the more luminous it is.The temperature of the star: If two stars are of the same size but have different temperatures, then the star with a higher temperature will be more luminous than the star with lower temperatures.

## What are 3 things that affect the brightness of a star?

The apparent brightness of a star depends on both its luminosity and its distance from Earth. Thus, the determination of apparent brightness and measurement of the distance to a star provide enough information to calculate its luminosity.

## What are the factors affecting luminosity?

Factors Affecting Object Luminosity There are two important variables: the object’s effective temperature and size, and its radius, R, which affects the object’s luminosity. Size and Effective Temperature: Astronomers examine a star’s size and effective temperature to calculate its brightness.

## What two factors does the luminosity depend on?

Factors:The size of the star: The larger a star is, the more energy it puts out, and the more luminous it is.The temperature of the star: If two stars are of the same size but have different temperatures, then the star with a higher temperature will be more luminous than the star with lower temperatures.

## What factor most influences the brightness or luminosity of a star?

The apparent brightness (magnitude) of a star depends on its luminosity, which is an intrinsic magnitude of the star, and on its distance from us. A star’s luminosity, in turn, depends on both its effective temperature and its size.

## What are the two factors of luminosity?

Factors Affecting Object Luminosity There are two important variables: the object’s effective temperature and size, and its radius, R, which affects the object’s luminosity. Size and Effective Temperature: Astronomers examine a star’s size and effective temperature to calculate its brightness.

## What does luminosity depend on?

What properties determine the intrinsic power output or luminosity of a star? Temperature and size of the star. This relationship helps account for the huge range of stellar luminosities.

## What factors the luminosity of a star?

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