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10th grade Light: wavelength, frequency and energy worksheet

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Light: wavelength, frequency and energy

Grade 10 Science Worksheet - Building Confidence

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

  1. Using c = λν with c = 3.00 × 10⁸ m/s, what is the frequency of 400 nm light, in units of 10¹⁴ Hz, Ari?

  2. Using c = λν with c = 3.00 × 10⁸ m/s, what is the frequency of 500 nm light, in units of 10¹⁴ Hz, Bo?

  3. Using c = λν with c = 3.00 × 10⁸ m/s, what is the frequency of 600 nm light, in units of 10¹⁴ Hz, Esme?

  4. On the strip, which mark has the shortest wavelength, Jun?

    • 650 nm, red
    • 450 nm, blue
    • 550 nm, green
  5. What is a wave's wavelength, Milo?

    • The distance from crest to crest
    • The wave's height
    • The waves passing each second
  6. What does frequency measure, Noah?

    • Distance from crest to crest
    • How bright the light is
    • Waves passing each second
  7. If a light wave's wavelength gets longer, what happens to its frequency, Pia?

    • It goes down
    • It goes up
    • It stays the same
  8. Which kind of light has the longest wavelength, Ren?

    • Visible light
    • Radio waves
    • Gamma rays
  9. Where does ultraviolet sit compared with visible light, Tala?

    • Longer waves than red
    • Between red and green
    • Shorter waves than violet
  10. Where does infrared sit compared with visible light, Zee?

    • In the middle of the colors
    • Longer waves than red
    • Shorter waves than violet
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10th grade Light: wavelength, frequency and energy worksheet – printable
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About this worksheet

Light: wavelength, frequency and energy. Every version has 10 questions, and the answer key prints on the second page.

What your child will learn

  • I can use c = λν to find a frequency from a wavelength, with c = 3.00 × 10⁸ m/s.
  • I can use E = hν, with h = 6.626 × 10⁻³⁴ J·s, and E = hc ÷ λ.
  • I can order the electromagnetic spectrum and say that shorter waves carry more energy per photon.
  • I can link a bigger drop on the energy ladder to a bluer photon.

Standard: supports HS-PS4-1

Words to know

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

frequency (ν): Waves passing a point each second, in hertz

photon: One packet of light energy

Planck's constant (h): 6.626 × 10⁻³⁴ J·s; it links a photon's energy to its frequency

electromagnetic spectrum: All kinds of light, from radio to gamma rays

Common mistakes

Your child divided the wavelength by the speed. Frequency is c ÷ λ, and energy is hc ÷ λ: the wavelength goes on the bottom.

Your child divided h by the frequency. Energy grows with frequency: E = h × ν.

Your child thought longer waves carry more energy. It's the reverse: shorter waves have higher frequency and more energy per photon.

Questions parents ask

What is the most common mistake with light: wavelength, frequency and energy?

Your child divided the wavelength by the speed. Frequency is c ÷ λ, and energy is hc ÷ λ: the wavelength goes on the bottom.

Are these 10th 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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