1. How does a white flower look when viewed through a blue glass? Through a red glass? Through a red and blue glass at the same time?
2. Why does a red ribbon appear black when seen by blue light and red when seen by red light?
3. In what part of the sky must you look to see a rainbow in the morning? In the afternoon? Explain.
4. How would you arrange two similar prisms so as to produce double the deviation produced by one?
5. The color of an object depends upon what two things?
6. What kind of a spectrum should moonlight give? Why?
7. A mixture of green and red lights gives a sensation of yellow. Can you suggest why a mixture of blue and yellow lights gives the sensation of white?
(8) Nature of Light, Interference, Polarization
410. The Corpuscular Theory.—The theory of the nature of light that was most generally accepted until about the year 1800, held that light consists of streams of minute particles, called corpuscles, moving at enormous velocities. This corpuscular theory was in accord with the facts of reflection and the rectilinear motion of light, but was abandoned after the discovery of the interference of light, as it could not account for the latter phenomenon.