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Grade 11 · Science · Physics

11th grade Quantum ideas and where they are used worksheet

6 printable versionsBuilding Confidence10 questions · answer keyFree · no account

Level: Building Confidence · On Level · Challenge Me

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Quantum ideas and where they are used

Grade 11 Science Worksheet - Building Confidence

NameDate

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

  1. This LED's energy gap is 1.9 eV. With hc = 1239.84 eV·nm, what wavelength of light does it give out, to the nearest nm, Ari?

  2. This LED's energy gap is 2.3 eV. With hc = 1239.84 eV·nm, what wavelength of light does it give out, to the nearest nm, Bo?

  3. This LED's energy gap is 2.8 eV. With hc = 1239.84 eV·nm, what wavelength of light does it give out, to the nearest nm, Esme?

  4. Read this first

    Use this

    Photon diagram beside a short passage: "In an LED, electrons drop across an energy gap and give out photons. Each photon's energy equals the gap. A gap of 2.3 eV gives green light near 539 nm; a wider gap gives bluer light."

  6. In the passage, how would an LED with a wider gap look, Kira?

    • Bluer
    • The same color, but brighter
    • Redder

  7. In the passage, what sets each photon's energy, Luz?

    Use the picture in question 4.

    • The LED's brightness
    • The battery's size
    • The size of the gap

  8. How does a solar cell make a current, Noah?

    • It stores sunlight as charge
    • Heat melts its wires
    • Photons free electrons in it

  9. What does an MRI scanner use to make pictures, Pia?

    • Sound waves
    • X-rays passing through the body
    • A strong magnet and radio waves

  10. In physics, what is a quantum, Ren?

    • A very large, sudden jump in energy or size
    • A kind of magnet
    • The smallest step an amount can change by

  11. What is one quantum of light called, Tala?

    • A photon
    • An electron
    • A huge burst of light

  12. What can be said about an electron's energy in an atom, Zee?

    • It can only be certain set amounts
    • It can take any amount
    • It stays at zero
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11th grade Quantum ideas and where they are used worksheet – printable
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About this worksheet

Quantum ideas and where they are used. Every version has 10 questions, and the answer key prints on the second page.

What your child will learn

  • I can say what a quantum is (the smallest step an amount can change by) and that atoms have set energy levels, which give each element its own spectral lines.
  • I can explain, in plain terms, superposition (a qubit holds 0 and 1 until measured) and the uncertainty principle (position and momentum can't both be known exactly; this is nature, not poor tools).
  • I can describe how lasers, LEDs, solar cells and MRI scanners work, and find an LED's color from its gap, an MRI frequency from its field, and an electron's wavelength.
  • I can check a "quantum" claim against evidence.

Standard: none (TX)

Words to know

quantum: The smallest step an amount, like energy, can change by

superposition: Being in a mix of states, like 0 and 1, until measured

qubit: A quantum bit that can be in a superposition of 0 and 1

uncertainty principle: Position and momentum can't both be known exactly at once

energy gap: The energy step an electron drops across in an LED

Common mistakes

Your child multiplied. The wavelength is hc ÷ E: a bigger energy gap gives a shorter wavelength.

Your child divided by the field. The MRI frequency grows with the field: f = 42.577 MHz per tesla × B.

Your child used the speed as m/s, not millions of m/s. Keep the 10⁶ in λ = h ÷ mv.

Questions parents ask

What is the most common mistake with quantum ideas and where they are used?

Your child multiplied. The wavelength is hc ÷ E: a bigger energy gap gives a shorter wavelength.

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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