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Helioseismology and Sun-quakes

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Questions and Answers

How can the pulsating motions of the sun be observed?

By studying the magnetic field variations on the sun's surface

By measuring the UV radiation emitted by the sun

By measuring the Doppler shifts of hydrogen lines across the face of the sun (correct)

By analyzing the changes in sunspot activity

What is the study of the surface of the sun and sun-quakes called?

Astronomy

Astrophysics

Helioseismology (correct)

Cosmology

What causes 'earthquakes' (sun-quakes) to occur on the surface of the sun?

Disturbances in the equilibrium of forces (correct)

Large-scale solar flares

Interactions with cosmic rays

Changes in the sun's magnetic field

What is the mode of propagation for vibrations inside the sun?

Propagation through a gaseous medium Signup and view all the answers

What law is used to calculate the surface temperature of a planet circulating the sun?

Stefan Boltzmann law Signup and view all the answers

What does helioseismology study?

The vibrations and earthquakes occurring on the surface of the sun Signup and view all the answers

What is used to measure the pulsating motions of the sun?

Measuring the Doppler shifts of hydrogen lines Signup and view all the answers

What is required for thermal equilibrium according to Stefan Boltzmann law?

All power absorbed from the sun must be re-radiated by the planet Signup and view all the answers

How do vibrations inside the sun propagate?

They propagate through a gaseous medium. Signup and view all the answers

What method is used to observe pulsating motions of stars?

Analyzing their spectral lines Signup and view all the answers

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