Final answer:
In the term ophthalmoscope, 'ph' is pronounced as the sound [f], following the convention derived from Greek to Latin and English.
Step-by-step explanation:
In the term ophthalmoscope, the ph has the sound of f. This is because in English, the letter combination ph is typically used to denote the sound [f], a convention that stems from the Greek letter phi, which was transcribed into Latin and subsequently English as ph. When looking at words like sapphire, we see an example of this with the 'pph' spelling indicating the same [f] sound, originating from the Greek where the 'p' was the letter pi and the 'ph' was phi.