Physics 101 - Homework 4

Instructions: Complete this form and click submit. The answers will be posted on the course home page after the due date and before the next exam. If you want to change any of your answers after you click submit, then go back and give your answers again and click submit.

Your Name:	e.g. John Doe
Your Campus ID:	e.g. 12345678
Your SFA Email Address:	e.g. doejd@titan.sfasu.edu
Due Date	10/12/2007 5:00PM

1. A lens that spreads incoming rays of light is a ____________ lens. a. converging b. diverging c. spherical d. convex 2. Rainbows are due to _____. a. reflection from the surface of raindrops. b. refraction and reflection by raindrops. c. refraction through raindrops. d. refraction and reflection by ice crystals. 3. Light travels ____ in water and ____ in air. a. slow, fast b. fast, slow 4. White is seen on a screen when green light is mixed with what color of light? a. blue b. cyan c. magenta d. ultraviolet 5. A mirage is a result of atmospheric ____. a. reflection. b. refraction. c. scattering. d. dispersion. e. aberrations. f. hallucinations. 6. Which colors listed are not complementary? a. red, cyan b. cyan, yellow c. blue, yellow d. black, white 7. The color of inks that are used in newspaper color pictures are the subtractive primary colors… a) red, blue, and yellow. b) red, blue, and magenta. c) yellow, blue, and green. d) magenta, cyan, and yellow. e) red, green, and blue. 8. The colored dots that make of the colors on a TV screen or computer monitor are the additive primary colors… a) red, blue, and yellow. b) red, blue, and cyan. c) yellow, blue, and green. d) magenta, cyan, and yellow. e) red, green, and blue. 9. The worst thing that you can do for the health of a green-leafed plant is to illuminate it with only a) red light. b) green light. c) blue light. d) all are equally bad. e) none of these. 10. Different colors of light correspond to different light a) speeds. b) intensities. c) wavelengths. d) polarities.

11. When you normally look at the red petals of a rose, the color light you're seeing is white minus red. red. cyan. a mixture of green and yellow. green. 12. Different colors of light correspond to different amplitudes of light. sound waves. atoms. intensities of light. vibrations of electrons in atoms. 13. A new red dress in sunlight will normally look the same shade of red under fluorescent light. under an incandescent lamp just as bright. in any light that contains adequate red in it. All of these. None of these. 14. Which of the following best matches the region of our most sensitive vision? The blue of a clear sky. A white golf ball. A red traffic light. A yellow-green Ping-Pong ball. A green traffic light. 15. The visible spectrum occupies the tail end of a tiny part of the electromagnetic spectrum. most of the electromagnetic and sonar spectrums. a tiny part of the electromagnetic spectrum. the additive part of the electromagnetic spectrum. a broad part of the electromagnetic spectrum. 16. When magenta is taken out of white light, the color that remains is blue. cyan. red. None of these. yellow. 17. If we lived on a planet where red light was most scattered in the atmosphere, the sky would look blue and the sunsets red. red and the sunsets green. red and the sunsets blue. strange–too much so to predict these things. black. 18. The ocean appears blue because water absorbs red light. A flag that is red, green, and white is viewed deep beneath the ocean surface via reduced intensity sunlight at that depth. The red, green, and white would likely appear cyan, magenta, and cyan. black, cyan, and white. black, green, and cyan. black, black, and cyan. cyan, green, and red.

Need more examples or assistance?  If you have a new text book then you may be able to access tutorials and online quizes at www.PhysicsPlace.com.  The Access Code for this site is normally included in the first few pages of the book. See Dr. B for help during these office hours.