Wavelength is the distance between two consecutive identical points on a wave, such as from one peak to the next peak or one trough to the next trough.
How 'long' one complete wave cycle is — the spatial size of a single repeating pattern.
Showing a random 20 of 50 problems.
Example 1
medium
Why must you convert wavelength to meters before computing wave speed in m/s from frequency in Hz?
Example 2
medium
A tuning fork emits a 256 Hz tone in air (v=340 m/s). Find its wavelength.
Example 3
easy
A water wave has a wavelength of 3 m and a period of 1.5 s. What is the wave speed?
Example 4
medium
A sound wave has frequency 440 Hz and travels at 343 m/s. Find the wavelength.
Example 5
medium
A sound wave of frequency 256 Hz travels at 343 m/s in air. Find its wavelength (round to two decimals).
Example 6
easy
A wave has speed 20 m/s and frequency 5 Hz. Find its wavelength.v = 20 m/s, f = 5 Hz → find λ
Example 7
easy
What symbol is used for wavelength?
Example 8
easy
A wave repeats every 0.25 m. What is its wavelength?The wave repeats every 0.25 m — what is λ?
Example 9
medium
Microwaves in a microwave oven have frequency 2.45 GHz. Find the wavelength. Use c=3×108 m/s.
Example 10
medium
A wave's wavelength is 6 m and it passes a point at 2 cycles per second. How far does the wave travel in 5 s?
Example 11
easy
Convert a wavelength of 2.5 cm to meters.
Example 12
easy
A guitar string vibrates so 4 full wavelengths fit in 1.2 m. What is the wavelength?
Example 13
easy
A wave has speed 12 m/s and frequency 4 Hz. Find its wavelength.v = 12 m/s, f = 4 Hz → λ = ?
Example 14
medium
Green light has wavelength 500 nm in vacuum. Find its frequency. Use c=3×108 m/s.
Example 15
challenge
A wave's wavelength is reduced from 5 m to 2 m while the medium (and thus speed) is unchanged at 40 m/s. Find the change in frequency.
Example 16
medium
A wave has wavelength 50 cm and frequency 4 Hz. Find the wave speed in m/s.
Example 17
challenge
A wave of frequency 100 Hz has wavelength 3.0 m in medium 1. Entering medium 2, its speed increases by 50% while frequency stays the same. Find the new wavelength.
Example 18
medium
Two consecutive troughs of a water wave are 3 m apart, and the wave passes a buoy 6 times per second. Find the wave speed.
Example 19
easy
Is wavelength measured horizontally (along travel) or vertically (height) on a transverse wave?Amplitude is vertical height; wavelength is horizontal distance
Example 20
easy
Are two points one wavelength apart on a wave in phase or out of phase?Points one wavelength apart are in phase