define- umbra , penumbra , solar eclipse, lunar eclipse.
Answers
Answer:
umbra-innermost darkest part of shadow
penumbra
penumbra-outer part of shadow
solar eclipse-occurs when moon blocks sun
lunar eclipse -occurs when earth is between sun and moon
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Answer:
umbra: a conical shadow excluding all light from a given source specifically : the conical part of the shadow of a celestial body excluding all light from the primary source. b : the central dark part of a sunspot.
penumbra: a space of partial illumination (as in an eclipse) between the perfect shadow on all sides and the full light. b : a shaded region surrounding the dark central portion of a sunspot.
solar eclipse: A solar eclipse occurs when a portion of the Earth is engulfed in a shadow cast by the Moon which fully or partially blocks sunlight. This occurs when the Sun, Moon and Earth are aligned. Such alignment coincides with a new moon indicating the Moon is closest to the ecliptic plane.
lunar eclipse: A lunar eclipse occurs when the Moon moves into the Earth's shadow. This can occur only when the Sun, Earth, and Moon are exactly or very closely aligned with Earth between the other two, and only on the night of a full moon.
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