Which of the following statements is true of the analysis called ...

[piesebel]

Which of the following statements is true of the analysis called helioseismology?
 
  A) The solar interior is observed using the light that emerges from below the photosphere.
  B) The cause of the 22-year cycle of sunspots is studied using the Sun's unchanged magnetic field.
  C) The vibrations in the Sun are used by solar astronomers to explore its depths.
  D) The unaltered electron orbits are detected when an atom is in a magnetic field.

Question 2

__________is an apparent change in the wavelength of radiation caused by relative motion of a source and observer.
 
  A) The black drop effect
  B) The Doppler effect
  C) The Casimir effect
  D) The common ion effect

[qytan]

Answer to Question 1

C

Answer to Question 2

B

[piesebel]

TYSM

[lcapri7]

Thanks for the timely response, appreciate it