Question

Which is a correct way to measure wavelength?
A) Nearest peak to peak
B) Nearest peak to nearest trough
C) Nearest trough to peak
D) None of the above

Answer 1

answer : option (A) Nearest peak to peak

explanation : wavelength is the minimum separation between two successive crests or two successive trough.Wavelengths represent a repeating pattern of traveling energy, such as light or sound.

it is scalar quantity , it is denoted by $\lambda$. si unit of wavelength is metre.

in simple way, wavelength is minimum distance between nearest peak to peak or nearest trough to trough.

so, option (A) is correct choice.