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Parade

Ask Marilyn: How Small Are Those Droplets?

Jim Cook (city unknown) writes:

Marilyn: When answering a question about seeing your breath in cold weather, you added, "Actually, the droplets are so small that you can't see them, but they're made visible by the light they reflect." (February 17, 2012) Couldn't you say that about any object regardless of size? You couldn't see the car in your driveway—or even your driveway, for that matter—if they weren't reflecting light.

Marilyn responds:


True! A more careful (but perhaps a bit pedantic and certainly longer) statement could have been, "The droplets are so small that you can't see an individual droplet with an unaided eye, but the little mass of droplets is made visible by the light they all reflect."


 
 
 
 

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