Answer:
Option (C)
Explanation:
A lunar eclipse refers to the condition when the earth comes in between the sun and the moon, and when the moon passes through the darker portion of the earth. This darker portion of the earth through which the moon moves is called the umbra and the lighter portion is known as the penumbra.
As the earth comes in between the sun and the moon, it blocks all the sunlight that falls on the moon. Due to this, the moon appears dark. It sometimes looks reddish in color which is because the earth's atmosphere absorbs the other lights, allowing only the red light which has a higher wavelength.
When the moon is in the umbra portion of the earth's shadow zone, then this condition refers to a complete lunar eclipse.
Thus, the correct answer is option (C).
