When might you be able to see a halo around your head, and what would cause this?
What will be the ideal response?
ANSWER: On a clear morning with dew on the grass, stand facing the dew with your back to the sun and observe that, around the shadow of your head, is a bright area—the Heiligenschein (German for halo). The Heiligenschein forms when sunlight, which falls on nearly spherical dew drops, is focused and reflected back toward the sun along nearly the same path that it took originally. (Light reflected in this manner is said to be retroreflected.) The light, however, does not travel along the exact path; it actually spreads out just enough to be seen as bright white light around the shadow of your head on a dew-covered lawn.?
You might also like to view...
The age of the rock at spreading centers becomes ____________ with distance from the center. Fill in the blank(s) with the appropriate word(s)
In North America, ski resorts are typically built on the north slopes of mountains
Indicate whether the statement is true or false
________ are high latitude soils containing permafrost and large amounts of organic matter
A) Ultisols B) Inceptisols C) Gelisols D) Alfisols
In the United States, severe weather events kill ________ the combined total killed by earthquakes, volcanoes, and mass movements.
A. about the same number of people as B. more people per year than C. less people per year than