Extended light sources and eclipses

Question 1

What is an extended light source?

Answer 1

An extended light source is one that is large enough for rays to be seen coming from many points of

Question 2

How is an umbra formed?

Answer 2

An umbra is formed by a shadow formed by an extended light source

Question 3

What is a penumbra?

Answer 3

The penumbra is the fading grey regio between the totally dark umbra and the fully lit screen

Question 4

How is a penumbra formed?

Answer 4

The penumbra is formed when some light reaches the screen while most is blocked

Question 5

How is a solar eclipse formed?

Answer 5

A solar eclipse occurs when the sun, moon and earth are in a straight line and the moon comes in between the sun and the earth

Question 5

What is a solar eclipse?

Answer 5

A solar eclipse is when the sun casts a shadow of the moon on the earth.

Question 6

What is a lunar eclipse?

Answer 6

A lunar eclipse is when the sun casts a shadow of the earth on the moon.

Question 7

How does this occur the lunar eclipse?

Answer 7

This occurs when the sun, moon and earth are in a straight line and the earth comes between the sun and the moon.