Form 13: Shadows in Space: Umbra and Penumbra Exercise

Form 13: Shadows in Space: Umbra and Penumbra

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Form 13: Shadows in Space: Umbra and Penumbra

Study the umbra and penumbra shadow regions created during astronomical alignments. Learn how these shadows define different types of eclipses.

Questions

  1. MultiChoice

    What is the umbra?

  2. MultiChoice

    What is the penumbra?

  3. MultiChoice

    What is the antumbra?

  4. MultiChoice

    If you stand within an object's umbra, how much of the light source can you see?

  5. MultiChoice

    If you stand within an object's penumbra, how much of the light source can you see?

  6. MultiChoice

    Why do shadows in space have both an umbra and a penumbra?

  7. MultiChoice

    Which shadow region forms a cone that narrows as distance from the body increases?

  8. MultiChoice

    Which shadow region widens as distance from the blocking body increases?

  9. MultiChoice

    During a total solar eclipse, which part of the Moon's shadow touches Earth's surface?

  10. MultiChoice

    During a partial solar eclipse, which part of the Moon's shadow touches the observer?

  11. MultiChoice

    During an annular solar eclipse, which shadow region reaches Earth's surface?

  12. MultiChoice

    What determines the physical length of the Moon's or Earth's umbral shadow cone?