What is the wavelength of a wave?

a.) the distance between two crests of a wave.

b.) the amount of time that occurs in one full cycle.

c.) the amount of cycles that occur in a given time

d.) the size of the disturbance

explanation:

considering the bohr theory, the type of connection that requires the transfer the answer conuldn't be right

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me