TopicSlidesMinutes 1 Displacement Vectors Kinematics Graphs Energy Power Springs Field of Vision Colors Concave mirrors Convex mirrors Refraction Lenses Optical Power 618 Shadows

SHADOWS Shadows are formed when light is obstructed. The light may be totally obstructed thereby forming a dark shadow known as an umbra, or it may be partially obstructed thereby forming a gray shadow known as a penumbra. Click Penumbra (grey) Umbra (black)

Umbra Penumbra Click + + A) B) C) D) Shadows Slide:

Penumbra Click Shadows Slide:

When the moon’s penumbral shadow strikes the Earth, a partial eclipse is produced. In which region/s can a partial eclipse of the sun be seen? A) Region X only B) Region Y only C) Regions X and Z D) Regions X, Y and Z Click Shadows Slide:

… and good luck!