Question

question 2
why is the penumbra of a shadow lighter than its umbra?
a. a penumbra receives light from multiple sources.
b. a penumbra receives some light from a given light source.
c. a penumbra directly receives all the light from a light source.
d. a penumbra only appears to be lighter depending on your orientation to the light source.

Explanation:

• Umbra: It is the region of a shadow where no light from the light source reaches. It is completely dark.
• Penumbra: It is the region of a shadow where some light from the light source reaches. Since some light is present in the penumbra (while no light is present in the umbra), the penumbra is lighter than the umbra.

Answer:

B. A penumbra receives some light from a given light source.