Multiple choice..i want to check my answers with other people..help?

Question

1. Which of the following waves travels the fastest?

a. ultraviolet

b. infrared

c. radio waves

d. All travel at the same speed

2. Which type of polarized sunglasses would help reduce glare the best?

a. horizontally polarized

b. vertically polarized

c. diagonally polarized

3. An astronomer observes the light coming from a distant star. He notices several distinct bright lines in the spectrum. What kind of spectrum is he observing?

a. absorbtion

b. red shift

c. emission

d. polarization

e. ultraviolet

Answer 1

(1) d. All travel at the same speed -- (the speed of light, of course)

(2) b. vertically polarized

(3) c. emission

Answer 2

1 D

2 A

3 A

Answer 3

1. Which of the following waves travels the fastest?

d. All travel at the same speed

2. Which type of polarized sunglasses would help reduce glare the best?

don't know

3. An astronomer observes the light coming from a distant star. He notices several distinct bright lines in the spectrum. What kind of spectrum is he observing?

c. emission