To compare psychophysics and physics, if physicists study the physical properties of light and sound, psychophysicists

Human perception of light and sound

Explanation:

 According to the given question, if we compare the physics and the psycho-physics then the psycho-physics is basically studying about the different types of human perceptions of the sound and the light.

 On the other hand, the physicists is study about the various types of sound and the light properties.

The psychophysics is basically responsible for studying about the relationship between various types of physical characteristics about the frequency pf the sounds, sensations and the light based on the human perception.  

 Therefore, Human perception of light and sound  is the correct answer.

hello,

answer: a federal government has final authority on interstate/inter provincial  and international affairs, a confederation is one where the central/national government or authority is governing body what does not have final say over the same matters. hopefully this and i will try again if you don't like this answer : )

best of luck!

answer; criminal law;