What is the Stefan-Boltzmann constant used for in the context of stellar luminosity?

Radiative Equilibrium and Stellar Luminosity

Interactive Video
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Mathematics, Physics, Science
•
9th - 12th Grade
•
Hard

Patricia Brown
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
To determine the color of a star
To calculate the mass of a star
To calculate the power output of a star
To measure the distance to a star
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How is the intensity of radiation from a star determined?
By dividing the luminosity by the star's radius
By dividing the luminosity by the area of a sphere with a radius equal to the planet's orbit
By adding the luminosity to the star's mass
By multiplying the luminosity by the star's temperature
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What percentage of radiation is typically reflected away due to albedo?
10%
21%
75%
50%
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is it important to spread the radiation over the entire surface of the planet?
To determine the planet's orbit
To calculate the planet's mass
To measure the planet's gravitational pull
To ensure even heating of the planet
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the significance of dividing by four in the context of radiation distribution?
It accounts for the planet's rotation
It represents the planet's albedo
It adjusts for the planet's surface area
It corrects for the star's brightness
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What assumption is made about the atmosphere when calculating radiative equilibrium temperature?
The atmosphere absorbs all IR
The atmosphere is transparent to IR
The atmosphere is reflective to IR
The atmosphere is opaque to IR
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the general rule of thumb for emissivity if not provided?
Assume it is 1
Assume it is 0.75
Assume it is 0.5
Assume it is 0
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