vocabulary Flashcards
1
Q
umbra
A
point where all light rays (which are from light source) are blocked
2
Q
penumbra
A
partial blockage of light from a non-point light source EX. a shadow of a hand-the palm pitch black proper blockage of light (umbra) while the fingers barely shadowy are the penumbra
3
Q
regular reflection
A
a mirror basically anything transparent and u can see an image
4
Q
linear propagation
A
light travels in a straight line
5
Q
shadows
A
occur when an opaque object blocks direct sunlight (absence of light)
