In the ray diagram, a ray refracts at point O. If the line PQ separates two transparent media, which statement BEST describes it?

A) Ray AO is the incident ray, and OB is the normal.
B) Ray OB is the incident ray, and AO is the normal.
C) Ray AO is the incident ray, and OB is the refracted ray.
D) Ray OB is the incident ray, and AO is the refracted ray.

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.

points

explanation: