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Grade 11 · Science · Physics

11th grade Wave speed, frequency and wavelength worksheet

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Wave speed, frequency and wavelength

Grade 11 Science Worksheet - Challenge Me

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Circle the best answer, or write your answer on the line.

  1. Light travels at 299,792,458 m/s (NIST). What is the wavelength, in nanometers, of light with a frequency of 7.5 × 10¹⁴ Hz, to the nearest tenth, Bo?

  2. Light travels at 299,792,458 m/s (NIST). What is the wavelength, in nanometers, of light with a frequency of 4.6 × 10¹⁴ Hz, to the nearest tenth, Esme?

  3. Read this first

    Ripples in one water tank (example data)

    Frequency (Hz)Wavelength (cm)
    26
    34
    43
    6?

  4. Using the table, what is the ripples' speed, Jun?

    • 6 cm/s
    • 24 cm/s
    • 12 cm/s

  5. Using the table, what wavelength should 6 Hz ripples have, Kira?

    • 1 cm
    • 9 cm
    • 2 cm

  6. Milo says a high-pitched sound travels faster through air than a low one. Agree or disagree?

    • Agree: high notes have longer wavelengths
    • Agree: a higher frequency makes a faster wave
    • Disagree: sounds in the same air share one speed

  7. Noah says shaking a rope faster makes its waves travel faster. Agree or disagree?

    • Agree: frequency and speed are the same thing
    • Agree: more shakes push the waves along faster
    • Disagree: the rope sets the speed

  8. Pia says light slows down in water, so its frequency drops too. Agree or disagree?

    • Agree: slower waves have lower frequencies
    • Disagree: the frequency stays; the wavelength shrinks
    • Agree: light can't enter water

  9. An FM radio station broadcasts at 100 MHz. Using c = 299,792,458 m/s, about what is its wavelength, Ren?

    • About 0.3 m
    • About 3 m
    • About 30 m

  10. In a vacuum, how do the speeds of radio waves, visible light and X-rays compare, Tala?

    • X-rays are fastest
    • They are the same
    • Radio waves are fastest

  11. Red light has a longer wavelength than blue light. Which has the higher frequency, Zee?

    • Blue light
    • Red light
    • They are the same
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11th grade Wave speed, frequency and wavelength worksheet – printable
Print: 123456

About this worksheet

Wave speed, frequency and wavelength. Every version has 10 questions, and the answer key prints on the second page.

What your child will learn

  • I can use v = fλ and T = 1 ÷ f, reading λ from a ruler and f from a clock.
  • I can find the wavelength of sound (343.3 m/s in 20 °C air) and of light (c = 299,792,458 m/s, NIST), and compare speeds from a sourced table.
  • I can explain that the medium sets the speed and the source sets the frequency. Shaking a rope faster shortens the waves without speeding them up, and a wave entering a new medium keeps its frequency while its speed and wavelength change.
  • I can use flash-and-bang delays, ripple-tank data, and the same speed c for all electromagnetic waves.

Standard: HS-PS4-1

Words to know

frequency (f): Waves passing each second, in hertz (Hz)

period (T): The time for one wave: T = 1 ÷ f

wavelength (λ): The distance from one crest to the next

wave speed (v): How fast the wave travels: v = fλ

medium: The material a wave travels through; it sets the speed

Common mistakes

Your child divided. Wave speed is frequency × wavelength: the waves made each second times the length of each.

Your child thought shaking faster makes the wave faster. The medium sets the speed; shaking faster makes shorter waves.

Your child multiplied. Wavelength is speed ÷ frequency.

Questions parents ask

What is the most common mistake with wave speed, frequency and wavelength?

Your child divided. Wave speed is frequency × wavelength: the waves made each second times the length of each.

Are these 11th grade science worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

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