Learning Path
Question & Answer
Choose the Best Answer
A sharp shadow cast by a streetlamp
A fading shadow as the sun sets
A shadow created by a cloudy sky
A shadow cast by a nearby building
Understanding the Answer
Let's break down why this is correct
A penumbral shadow is soft and not sharply defined. Other options are incorrect because Many think a penumbral shadow looks sharp like a streetlamp’s shadow; A cloudy sky diffuses light, giving a dull shadow.
Key Concepts
Lunar Eclipse Phases
easy level question
understand
Deep Dive: Lunar Eclipse Phases
Master the fundamentals
Definition
Lunar Eclipse Phases involve the Earth casting its umbral and penumbral shadows on the Moon. As the Moon enters the Earth's penumbra, it gradually darkens, sometimes turning red due to atmospheric scattering. This phenomenon allows observers to study the relative sizes of the Earth and Moon based on the shape of the Earth's shadow on the Moon, as demonstrated by ancient Greek astronomers.
Topic Definition
Lunar Eclipse Phases involve the Earth casting its umbral and penumbral shadows on the Moon. As the Moon enters the Earth's penumbra, it gradually darkens, sometimes turning red due to atmospheric scattering. This phenomenon allows observers to study the relative sizes of the Earth and Moon based on the shape of the Earth's shadow on the Moon, as demonstrated by ancient Greek astronomers.
Ready to Master More Topics?
Join thousands of students using Seekh's interactive learning platform to excel in their studies with personalized practice and detailed explanations.