Multiple choice

Which of the following statements explains penumbra correctly?

  1. The darkest sunspot.

  2. The blackest part of a shadow from which all light is cut off.

  3. The completely dark portion of the shadow cast by the Earth, Moon or other body during an eclipse.

  4. A light shaded region surrounding the dark central portion of a sunspot (umbra).

  5. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Yes, it is correct. This shaded region surrounding the dark central portion of a sunspot (umbra) is the penumbra. A Penumbra is not as dark as the umbra region. It is light shaded part surrounding the dark shadow.

Keep practicing — related questions