Check it Identify the parts of a ray diagram for reflected light.
A:
B:
C:
D:
E:

The modern-day generator works on the principle of electromagnetic induction discovered by michael faraday in 1831-32. faraday discovered that the above flow of electric charges could be induced by moving an electrical conductor, such as a wire that contains electric charges, in a magnetic field.

The anwser is: wave a has a greater pitch and frequency.