Chapter 25 Chapter 25 Review ActivityReview Activity

• A. ultravioletA. ultraviolet• B. violetB. violet• C. infraredC. infrared• D. redD. red

# 1. What are 2 electromagnetic # 1. What are 2 electromagnetic waves that are invisible to our eye?waves that are invisible to our eye?

• A) radioA) radio• B) infraredB) infrared• C) X raysC) X rays• D) ultravioletD) ultraviolet

# 2. Which of these electromagnetic # 2. Which of these electromagnetic waves has the longest wavelengthwaves has the longest wavelength

Radio

• A. Most of it.A. Most of it.• B. About half of itB. About half of it• C. Only one fifth of it.C. Only one fifth of it.• D. Very little of it.D. Very little of it.

#3. Visible light#3. Visible light makes up what part makes up what part of the electromagnetic spectrum? of the electromagnetic spectrum?

• A) transmitted.A) transmitted.• B) absorbed.B) absorbed.• C) reflected.C) reflected.• D) all of these.  D) all of these.  

# 4. The color of an object is the # 4. The color of an object is the same as the light that issame as the light that is

• A) redA) red• B) whiteB) white• C) blueC) blue• D) yellow D) yellow

#5. What color light is transmitted #5. What color light is transmitted by a piece of blue glass?by a piece of blue glass?

• A) red, blue, yellowA) red, blue, yellow• B) red, blue, greenB) red, blue, green• C) yellow, blue, greenC) yellow, blue, green• D) None of theseD) None of these

# 6. The colored dots that make up # 6. The colored dots that make up the color on a TV screen arethe color on a TV screen are

• A. ultravioletA. ultraviolet• B. visibleB. visible• C. infraredC. infrared• D. x-rayD. x-ray

# 7. What form of light give us a tan?# 7. What form of light give us a tan?

• A) red and blue light.  A) red and blue light.  • B) red and cyan light.  B) red and cyan light.  • C) red and yellow light.  C) red and yellow light.  • D) yellow and green light.  D) yellow and green light.  

# 8. Magenta light is really a mixture # 8. Magenta light is really a mixture ofof

• A) red, green, and blue.A) red, green, and blue.• B) red, green, blue, and black.  B) red, green, blue, and black.  • C) magenta, cyan, and yellow.C) magenta, cyan, and yellow.• D) magenta, cyan, yellow, and black.  D) magenta, cyan, yellow, and black.  

# 9. A full-color picture in a # 9. A full-color picture in a magazine is made with inksmagazine is made with inks

• A) radioA) radio• B) infraredB) infrared• C) X raysC) X rays• D) ultravioletD) ultraviolet

# 10. Which of these electromagnetic # 10. Which of these electromagnetic waves has the shortest wavelengthwaves has the shortest wavelength

X-Ray

• A) red light.A) red light.• B) yellow light.B) yellow light.• C) magenta light.C) magenta light.• D) cyan light. D) cyan light.

# 11. A sheet of red paper will look # 11. A sheet of red paper will look black when illuminated withblack when illuminated with   

• A) magenta, cyan, yellowA) magenta, cyan, yellow• B) red, blue, greenB) red, blue, green• C) yellow, blue, greenC) yellow, blue, green• D) None of theseD) None of these

# 12. What colors do the rods in # 12. What colors do the rods in our eyes see?our eyes see?

• A) magenta, cyan, yellowA) magenta, cyan, yellow• B) red, blue, greenB) red, blue, green• C) Only rods have color.C) Only rods have color.• D) Type A, b, c.D) Type A, b, c.

#13. What are the three types of #13. What are the three types of cones in our eyes?cones in our eyes?

• A) velocitiesA) velocities• B) intensitiesB) intensities• C) polaritiesC) polarities• D) frequenciesD) frequencies

#14. Different colors of light #14. Different colors of light correspond to different light correspond to different light

• A) blue light.A) blue light.• B) cyan light.B) cyan light.• C) yellow light.C) yellow light.• D) white light. D) white light.

#15. A blue object will appear black #15. A blue object will appear black

when illuminated withwhen illuminated with    

The pictures below represent the strength of signals reaching the brain from the color receptors in the eye. Filled boxes indicate a strong signal. Empty boxes represent no signal. Use the pictures to answer the following questions.

• What color does this represent?What color does this represent?• A. BlueA. Blue• B. YellowB. Yellow• C. White C. White • D. BlackD. Black

The pictures below represent the strength of signals reaching the brain from the color receptors in the eye. Filled boxes indicate a strong signal. Empty boxes represent no signal. Use the pictures to answer the following questions.

• What color does this represent?What color does this represent?• A. BlueA. Blue• B. YellowB. Yellow• C. Red C. Red • D. GreenD. Green

• A. BlueA. Blue• B. YellowB. Yellow• C. MagentaC. Magenta• D. CyanD. Cyan

#16. What color is a?#16. What color is a?

• A. BlueA. Blue• B. YellowB. Yellow• C. MagentaC. Magenta• D. CyanD. Cyan

#17. What color is b?#17. What color is b?

• A. BlueA. Blue• B. YellowB. Yellow• C. MagentaC. Magenta• D. CyanD. Cyan

#18. What color is c?#18. What color is c?

• A. BlueA. Blue• B. YellowB. Yellow• C. MagentaC. Magenta• D. CyanD. Cyan

#19. What color is d?#19. What color is d?

#20. #20.