What are the two regions of a shadow?
Umbra
Penumbra
Umbrella
The two regions of a shadow are: i) Umbra, which is the darkest region of a shadow. ii) Penumbra, which is the less dark region of a shadow.
If the Moon is in penumbra region of the Earth's shadow then total lunar eclipse occurs.
Write answers the following questions.
(a) Why does an object cast a shadow on a screen?
(b) What is the connection between the formation of shadows and the propagation of light?
(c) Explain what is meant by umbra and penumbra with the help of diagrams.
(d) When does a solar eclipse take place?