Granulation is caused by:
A) shock waves in the corona.
B) rising and falling currents of gas in and just below the photosphere.
C) the solar wind flowing away from the corona.
D) the temperature variability in the chromosphere, which causes sudden heating.
Question 2
The electrons are bound to an atom by the attraction between their negative charge and the positive charge on the nucleus. This attraction is known as the _____.
A) Coulomb force
B) Doppler effect
C) Lorentz force
D) Casimir effect