Light rays travels in straight line. The light rays travel away from the light source. White light rays goes trough the prism and got seperated causing different colors of light to come out.
Luminous objects are objects that can give out light by itself Example: sun, fire, star Moon is not a light source
Light goes trough the periscope and got reflected to your eyes by mirrors placed in a fixed angle allowing you to see the object on higher or lower ground
Shadow are created when light rays are blocked by an item. Usually opaque items. Translucent items also created shadow but less darker then the one made by opaque stuff. The closer an object is to the light source the bigger the shadow
The moon reflects the sun light, like a cat eye reflecting the cars light at night. If a light wave of a given frequency strikes a material with electrons having the same vibration frequencies, then those electrons will absorb the energy of the light wave and transform it into vibration motion.
A rainbow, forms when the Sun shines on droplets of water. It usually takes the form of a single arc. Rainbows caused by sunlight always appear in the section of sky directly opposite the sun.
Smooth surface is nice to touch. Rough surface is not nice to touch. TeeHee!!!
a smooth surface would let all the light through in one direction or angle, but a rough surface would make the different rays of light come out at different angles making the different colors more easily visible.