Optical phenomenon and Physical phenomenon

Optical phenomenon noun - A physical phenomenon related to or involving light.

Physical phenomenon and optical phenomenon are semantically related. In some cases you can use "Physical phenomenon" instead a noun phrase "Optical phenomenon".

Physical phenomenon noun - A natural phenomenon involving the physical properties of matter and energy.

Optical phenomenon and physical phenomenon are semantically related. Sometimes you can replace phrase "Optical phenomenon" with "Physical phenomenon", this phrases are similar.