How often a wave passes a point, related to pitch or color, is called what?

How often a wave passes a point, related to pitch or color, is called what?

• A. Amplitude
• B. Wavelength
• C. Frequency
• D. Speed

Answer: (C)

Frequency is how often a wave passes a point per second. Measured in hertz, it explains why higher frequencies give higher pitches in sound and relate to color in light—higher frequencies sit toward the violet end of the spectrum. The wave’s speed is linked to frequency and wavelength by the relationship v = fλ, but the key idea here is that frequency is the count of cycles per unit time. Amplitude describes how tall the wave is (loudness or brightness), wavelength is the distance between crests, and speed is how fast the wave travels.

Frequency is how often a wave passes a point per second. Measured in hertz, it explains why higher frequencies give higher pitches in sound and relate to color in light—higher frequencies sit toward the violet end of the spectrum. The wave’s speed is linked to frequency and wavelength by the relationship v = fλ, but the key idea here is that frequency is the count of cycles per unit time. Amplitude describes how tall the wave is (loudness or brightness), wavelength is the distance between crests, and speed is how fast the wave travels.