2025 ASTR 1102 FINAL EXAM WITH ACCURATE QUESTIONS AND VERIFIED
ANSWERS COVERING STELLAR EVOLUTION, GALAXIES, COSMOLOGY, AND
ADVANCED ASTRONOMY CONCEPTS.
Atomic nuclei are made of the following particles;answer-neutrons and protons
Which color of light has the highest frequency;answer-Blue
The black body spectrum of a star peaks at a shorter wavelength than most of the sun. The sun
must therefore be:;answer-hotter than the sun
A star has half the temperature of the sun. How much dimmer is the star from the
sun?;answer-16x dimmer
In 1 billion years from today, the total amount of Helium in the core of the sun will be;answer-
more than it is today
An experiment indicates that a few aspects of the theory concerning the dual wave-particle
nature of light are wrong. That means the entire theory about the dual nature of light
is:;answer-challenged, but more experiments are needed to solidify new insights
Which one of the following types of radiation is entirely blocked by Earth's
atmosphere?;answer-x-rays
Photons take a long time to diffuse through the sun's radiative zone because;answer-they
interact billions and billions of times with the surrounding material
Granulation is the collection of features on the solar photosphere that;answer-correspond to
the outer part of the sun's connective zone
, The solar corona is;answer-much hotter than the photosphere
The fact that the sun is rotating "differently";answer-the 11 year solar activity cycle
The statement "the hotter it is, the brighter it is" stemming from the Stefan-Boltzmann law
means that;answer-for a black body hotter means brighter at every wavelength
Which law states that cool, thin, transparent gas in front of hot, opaque object results in an
absorption line spectrum;answer-Kirchhoff's 3rd law
Which of the following solar phenomena can have a disastrous effect in modern
civilization?;answer-Coronal Mass Ejections
Which one of the following can be well-studied in the gamma rays using orbital gamma ray
telescopes?;answer-very hot gas accrediting onto black holes
Nuclear reactions in the core of the sun produce;answer-about 10^38 neutrinos per second
Which one of the following statements is correct;answer-The aurora is formed by the
interaction of charged particles from the sun that reach the upper atmosphere for the Earth as
"solar wind" and get trapped in the Earth's magnetic field
Which of the following methods of energy transport is NOT active in the sun and most regular
stars?;answer-Heat conduction
Layers of Sun- from center to outer;answer-solar core, radiative zone, convection zone,
photosphere, chromosphere, solar corona
Stephan-Boltzmann law;answer-"the hotter it is, the brighter it is"
ANSWERS COVERING STELLAR EVOLUTION, GALAXIES, COSMOLOGY, AND
ADVANCED ASTRONOMY CONCEPTS.
Atomic nuclei are made of the following particles;answer-neutrons and protons
Which color of light has the highest frequency;answer-Blue
The black body spectrum of a star peaks at a shorter wavelength than most of the sun. The sun
must therefore be:;answer-hotter than the sun
A star has half the temperature of the sun. How much dimmer is the star from the
sun?;answer-16x dimmer
In 1 billion years from today, the total amount of Helium in the core of the sun will be;answer-
more than it is today
An experiment indicates that a few aspects of the theory concerning the dual wave-particle
nature of light are wrong. That means the entire theory about the dual nature of light
is:;answer-challenged, but more experiments are needed to solidify new insights
Which one of the following types of radiation is entirely blocked by Earth's
atmosphere?;answer-x-rays
Photons take a long time to diffuse through the sun's radiative zone because;answer-they
interact billions and billions of times with the surrounding material
Granulation is the collection of features on the solar photosphere that;answer-correspond to
the outer part of the sun's connective zone
, The solar corona is;answer-much hotter than the photosphere
The fact that the sun is rotating "differently";answer-the 11 year solar activity cycle
The statement "the hotter it is, the brighter it is" stemming from the Stefan-Boltzmann law
means that;answer-for a black body hotter means brighter at every wavelength
Which law states that cool, thin, transparent gas in front of hot, opaque object results in an
absorption line spectrum;answer-Kirchhoff's 3rd law
Which of the following solar phenomena can have a disastrous effect in modern
civilization?;answer-Coronal Mass Ejections
Which one of the following can be well-studied in the gamma rays using orbital gamma ray
telescopes?;answer-very hot gas accrediting onto black holes
Nuclear reactions in the core of the sun produce;answer-about 10^38 neutrinos per second
Which one of the following statements is correct;answer-The aurora is formed by the
interaction of charged particles from the sun that reach the upper atmosphere for the Earth as
"solar wind" and get trapped in the Earth's magnetic field
Which of the following methods of energy transport is NOT active in the sun and most regular
stars?;answer-Heat conduction
Layers of Sun- from center to outer;answer-solar core, radiative zone, convection zone,
photosphere, chromosphere, solar corona
Stephan-Boltzmann law;answer-"the hotter it is, the brighter it is"
