The Fraunhofer lines in the solar spectrum are actually: a. emission lines from hot gases in the chromosphere of the Sun.
b. absorption lines due to the thin outer layer above the photosphere.
c. Zeeman lines around sunspots due to their strong magnetic fields.
d. redshifted lines due to the Sun's rotation.
e. emission sections of the continuous spectrum of the photosphere.

Which of the following is part of the explanation or description of electromagnetic waves? (select all that apply) a. electrically charged molecules in a medium transfer their energy to nearby electrically charged molecules. b. a changing electric field causes a changing magnetic field. c. magnetic molecules in a medium transfer their energy to nearby magnetic molecules. d. a changing magnetic field causes a changing electric field.

Examine the drawing of a molecule. each ring represents an atom of nitrogen (n). what’s the chemical formula of this substance?

If jason ii needs 15 kw of power at 300 volts to operate, what amperage of current must flow through the cable?