Light, Color, and Atmospheric Optics
Light, Color, and Atmospheric Optics
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Chapter 4 Notes |
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Go to the images
and diagrams page.
1. Do you understand how the eye perceives light?
2. Do you know why clouds are sometimes white?
3. Do you understand why rain clouds are dark?
4. Do you know why clear skies are blue?
5. Do you understand why the sun appears white at midday, and yellow, red, or orange at sunrise and sunset?
6. Do you understand the relationship between refraction and sunrise and sunset?
7. Can you explain why stars twinkle?
8. Did you understand how rainbows are formed?
1. Why are cumulus clouds normally white?
2. Why do the undersides of building cumulus clouds frequently change color from white to dark gray or even black?
2. Explain why the sky is blue during clear days and black at night.
3. What can make a setting (or rising) sun appear red?
4. Why, on hazy days, does the horizon appear white?
5. Why do stars twinkle?
6. Since twilight occurs without the sun being visible, how does it tend to lengthen the day?
7. Explain this rhyme: Rainbow in morning, jogger's take warning. Rainbow at night, jogger's delight.
8. Why are secondary rainbows higher and much dimmer than primary rainbows? Explain your answer with the aid of a diagram.
9. Explain why on a cloudless day the sky will usually appear milky white before it rains and a deep blue after it rains.
(important information, please read)
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