• Categories

  • Most Popular Questions

  • Recently Viewed Questions

  • Recent Answers

    How To Make a Digita… on What does a frequency of 100 H…
    Daigrepont on Can an earthquake cause air tu…
    Benedict on How did God come into exi…
    joshua on How does the human body g…
    Ian on How did God come into exi…
  • Recent Questions

  • Blog Stats

    • 2,214,856 hits
  • Visitors since 11-3-08

    counter create hit
  • Terms and Conditions

  • Warning

    We are doing maintenance on this site, so some posts may disappear for a short time. Sorry. Normal service will soon be resumed...
  • Pages

  • March 2008
    M T W T F S S
    « Feb   Apr »
     12
    3456789
    10111213141516
    17181920212223
    24252627282930
    31  
  • Archives

  • Meta

Why do hairs floating in a bath make such unusual shadows?

Why do hairs floating in a bath make such unusual shadows?
Joe Beacham from Devon (Age 5-14)

Advertisements

One Response

  1. The unusual shadows are caused by the fact that the hairs are sitting on the surface of the water. When they do that they distort the normally flat surface and we can see the distortion by the way the light is distorted as it travels through the distorted surface. The light is affected both by reflection(which depends on angle of the incident light) and also by refraction at the surface. The amount angle change at Refraction also depends on the angle of incidence.

    Fish use this change to see insects who land on the surface of ponds etc and then try to eat them. Which is why fishermen sometimes use fishing flys to mimic insects on water. The better they mimic the insect on the water surface the more the fish bite.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: