properties of light Flashcards
1
Q
define light
A
electromagnetic waves the human eye can detect
2
Q
define shadow
A
dark frame behind opaque or translucent object
3
Q
what are the parts of a shadow
A
umbra - darkest part
prenumba - lighter parts
4
Q
how does light travel
A
in straight lines
5
Q
what is a medium
A
a material which light travels through
6
Q
what is the speed of light in a vacuum
A
c = 3.00 x 10^8 m/s
7
Q
what is a light ray
A
the path taken by light energy
8
Q
what is a light beam
A
a stream of light rays
9
Q
what is a ray box
A
a device used to produce beams and rays of light for use in experiments
