Silver Burdett/

Science: Understanding Your Environment/

Characteristics of Light p. 169/

1975/

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S4N15/

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/-/Some evening,=U--02 go*- (into a closet )(with a flashlight. )/-/Turn on*D1 the flashlight /C/and close*D1 the door. /-/Look*- (around you. )/-/Is*N1 there light only (in front )(of the flashlight? )/-/Where is*- the most light? /-/Turn*D1 the flashlight off. /-/Where does the light go?*- /-/You know*D1 [DOthat electrical energy is changed*P (to light energy. )]/-/Light energy travels*- away (from the bulb )(in the flashlight. )/-/Light energy travels*- (in the direction )[JRa flashlight is pointed.*P ]/c/But the direction [JM(in which )the light energy travels*- ]may be changed.*P /-/The direction changes*- [ARwhen light is reflected*P (by matter. )]/-/Light can travel*- (through some kinds )(of matter. )/-/Matter [JM(through which )light can pass*- ]is*A1 translucent tranSLOOSunt.=APR01 /-/[ALIf the matter is*A1 clear enough to see=IAV030 through, ]it is*A1 transparent tranzPARunt.=APR01 /-/Glass, many plastics, and air are*A1 translucent. /-/Which (of these materials )are*A1 usually transparent? /-/Light does not travel*- (through some kinds )(of matter. )/-/Two things may happen*- (to light energy )[JRthat hits*D1 this kind (of matter. )]/-/It may be reflected,*P /C/or it may be absorbed.*P /-/Matter may also reflect*D1 part (of a beam )(of light )and absorb*D1 the rest. /-/Can you explain*D1 [DOwhy the brightest light is*-1P (in front )(of a flashlight? )]/-/Why can you see*D1 objects (in a closet )[JRthat are*-1P not (in front )(of the flashlight? )]/-/What happens*- (to the light energy )(in the closet )[ARwhen you turn off*D1 the flashlight? ]/-/How fast is*A1 "fast"? /-/You would be*N1 a very fast runner [ARif you could run*- a mile=U--01 (in 4 minutes. )]/-/How many miles=U--03 an hour=U--02 would you be traveling?*- !!!!!!!!