17.1 What is the wavelength of yellow light?
17.2 What color is light whose wavelength is 500 nm?
17.3 What color is light whose wavelength is 600 nm?
17.4 How would you describe EM radiation whose wavelength is 300 nm?
17.5 What would you call EM radiation whose wavelength is 900 nm?
17.6 Why are sunburns caused by UV radiation but not by IR radiation?
17.7 "Monochromatic" is a big word that means "single-wavelength". We sometimes talk of monochromatic violet light or monochromatic yellow light or monochromatic red light. Can we reasonably talk about monochromatic white light?
17.8 The order of the colors in a spectrum are sometimes remembered by the name Roy G. Biv. Explain how or what this means?
17.9 Why might someone say that X-rays are very high frequency light waves?
17.10 How are light waves and sound waves different? How are they similar?
17.11 Could someone correctly say that X-rays are very high frequency sound waves?

17.2 Dispersion and Spectra

17.12 Why is no spectrum produced if white light passes through a rectangular solid made of glass? That is, why are the non-parallel sides of a prism so important in producing a spectrum?
17.13 What experiment can you think of that shows that the presence of all colors makes white light?
17.14 Which color of light travels fastest through glass?
17.15 Which color of light travels slowest through glass?
17.16 Why will there be more "fire" or sparkle in a jewel if it has been cut so the light undergoes several internal reflections before exiting?
17.17 Why is there more "fire" or sparkle in a diamond than in ordinary glass?
17.18 As light goes from air to water, its speed decreases but its frequency remains the same. What happens to its wavelength.

17.3 Rainbows

17.19 Why is the region inside a rainbow brighter than the region outside the rainbow?
17.20 Why is the region between a double rainbow dark?
17.21 What is meant by saying that light coming into a spherical water drop at various distances from the centerline will have a "minimum scattering angle"?
17.22 How does dispersion play a part in forming a rainbow?
17.23 Is total internal reflection necessary to form a rainbow?
17.24 At noon, after a summer rainstorm, in which direction should you look to find a rainbow?

17.4 Color Vision

17.25 What does the cornea of the eye do?
17.26 What does the crystalline lens of the eye do?
17.27 What does the iris of the eye do?
17.28 What is the retina of the eye?
17.29 According to your experiments with Figure 17.14, concerning the blind spot of your eye, is the blind spot toward or away from the center of your head, as seen from your fovea?
17.30 Before buying a new suit from a clothing store that has fluorescent lights, why might a person want to take the new suit outside into the daylight?

17.5 Color Addition

17.31 Red and blue spotlights shining onto a white screen produce what color?
17.32 When the blue and green phosphors on a color TV screen are illuminated, what color will be seen?
17.33 When the red and green phosphors on a color monitor are glowing, what color will be seen?
17.34 Which colored dots on a TV screen are "on" in a region that we see as turquoise or cyan?
17.35 Which colored dots on a TV screen are "on" in a region that we see as fuschia or magenta?
17.36 Which colored dots on a TV screen are "on" in a region that we see as white?
17.37 Which colored dots on a TV screen are "on" in a region that we see as black?
17.38 If a singer comes on stage wearing a yellow outfit under white lights, what will her costume look like if the lights are suddenly change to blue? What if the lights are suddenly changed to red? What if they are changed to green?
17.39 If a performer comes on stage wearing a magenta outfit under white lights, what will his costume look like if the lights are suddenly changed to blue? What if the lights are suddenly changed to red? What if they are changed to green?

17.6 Color Subtraction

17.40 What color is produced when yellow paint is mixed with cyan (blue-green) paint?
17.41 What color is produced when magenta (or fuschia) paint is mixed with cyan (blue-green) paint?
17.42 What color is produced when yellow paint is mixed with magenta (or fuschia) paint?
17.43 What color is produced when yellow paint, magenta (or fuschia) paint, and cyan (blue-green) paint are all mixed together?
17.44 Consider white light that shines through a yellow filter and then through a cyan (blue-green) filter. What color of light comes through this second filter?
17.45 Consider white light that shines through a magenta (or fuschia) filter and then through a cyan (blue-green) filter. What color of light comes through this second filter?
17.46 Consider white light that shines through a yellow filter and then through a magenta (or fuschia) filter. What color of light comes through this second filter?

17.7 More on Color

17.47 If one spotlight shines white light through a red filter and another spotlight shines white light through a green filter, what will be seen where these two lights overlap on a white screen? Instead, if a single spotlight shines white light through overlapping red and green filters, what will be seen?
17.48 What color will be seen if red and yellow spotlights shine on a white screen? Explain your answer.
17.49 What color will be seen if blue and yellow spotlights shine on a white screen? Explain your answer.
17.50 What color will be seen if blue and magenta (or fuschia) spotlights shine on a white screen? Explain your answer.
17.51 What color will emerge if white light passes through a red filter and then a yellow filter? Explain your answer.
17.52 What color will emerge if white light passes through a blue filter and then a yellow filter? Explain your answer.
17.53 What color will emerge if white light passes through a green filter and then a magenta (or fuschia) filter? Explain your answer.
17.54 What color will emerge if white light passes through a green filter and then a cyan (blue-green) filter? Explain your answer.