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[SOLVED] another SAT II Physics question: optics
A point source light which has an intensity level of 10 candle power at a distance of 2 m will have an intensity at 4 m of
A) .5 cp
B) 1 cp
C) 2.5 cp
D) 5 cp
E) 10 cp
i don't really know...my book doesn't really address this
i don't even know what a point source light does.
i tried to set up a proportion, but i got 20 as my answer, which is obviously wrong!
PLEASE HELP!
anything to start me off would be greatly appreciated!
Homework Statement
A point source light which has an intensity level of 10 candle power at a distance of 2 m will have an intensity at 4 m of
A) .5 cp
B) 1 cp
C) 2.5 cp
D) 5 cp
E) 10 cp
Homework Equations
i don't really know...my book doesn't really address this
i don't even know what a point source light does.
The Attempt at a Solution
i tried to set up a proportion, but i got 20 as my answer, which is obviously wrong!
PLEASE HELP!
anything to start me off would be greatly appreciated!