In Huygens's construction, all points on a wave front:
a. act as point sources for the production of secondary spherical waves.
b. act as particles.
c. demonstrate the dual nature of light.
d. must be sources of plane waves.
[Ques. 2] Huygens's wave theory requires which of the following with regard to the relative speeds of light in glass and in air?
a. Speed in air is greater than in glass.
b. Speed in air is less than in glass.
c. Speed in air equals that in glass.
d. Speed in glass equals square root of that in air.
[Ques. 3] What is the maximum possible arc that can be subtended by a rainbow? (Consider all possible viewing geometries).
a. 90
b. 180
c. 270
d. 360
[Ques. 4] A rainbow is a result of:
a. different color droplets of water.
b. dispersion.
c. interference.
d. the Huygens Effect.
[Ques. 5] In glass, which of the following colors of light travels fastest?
a. red
b. blue
c. yellow
d. All three of the above travel at the same speed.
[Ques. 6] White light is sent through a prism, and the various colors are separated in typical fashion. Which of the following colors would have the highest index of refraction in this prism?
a. red
b. green
c. yellow
d. blue
[Ques. 7] Light of colors 1 and 2 are sent through a prism and the rays of light of color 2 bend more. Which of the following is not true?
a. The index of refraction for color 2 is greater than that for color 1.
b. The two colors of light have different frequencies associated with them.
c. The speed of light for color 2 is greater than that for color 1 in this prism.
d. The wavelength for color 1 is different than that for color 2 in this prism.
[Ques. 8] When light passing through a prism undergoes dispersion, the effect is a result of:
a. different wavelengths traveling at different speeds.
b. different wavelengths having different indices of refraction.
c. different wavelengths refracting differently.
d. All of the above.
[Ques. 9] When white light disperses as it passes through a prism, which of the following colors moves at the lowest speed in the prism?
a. blue
b. green
c. yellow
d. red
[Ques. 10] A certain kind of glass has nblue = 1.650 for blue light and nred = 1.610 for red light. If a beam of white light (containing all colors) is incident at an angle of 60.6, what is the angle between the red and blue light inside the glass?
a. 0.91
b. 0.89
c. 60
d. 0.78
e. 89
Quick Reply
