The intensity of light decreases as the inverse square of the distance. This means that for 2 light bulbs located 1 and 2 meters from you, the dimmer light bulb will be

a. 2 meters away and half as bright.

b. 2 meters away and one fourth as bright.

c. 1 meters away and one half as bright

d. 2 meters away and twice as bright

Question

The intensity of light decreases as the inverse square of the distance. This means that for 2 light bulbs located 1 and 2 meters from you, the dimmer light bulb will be



 a. 2 meters away and half as bright.

 b. 2 meters away and one fourth as bright.

 c. 1 meters away and one half as bright

 d. 2 meters away and twice as bright

anonymous · Answer

I mean i think it is C

anonymous · Answer

The answer I believe it actually B haha :P
Reason being is that the dimmer is obviously the farther one, considering they are equal in intensities. But intensity DECREASES by 1/r^2, so at 2 m, 1/2^2 is 1/4. 

So you'll see the 2m one at 1/4 intensity :P

anonymous · Answer

lol Thank you I am taking what you just said and putting it into my notes lol for test day!

anonymous · Answer

Haha no problem. I'm taking Physics II, so we're doing EM Theory and the same inverse square law applies for forces and fields with electricity! Decreases by 1/r^2!