1. the wavelength increases and the frequency is unchanged.
When light passes from vacuum (index of refraction n = 1) into water (n = 1.333),
the wavelength increases and the frequency is unchanged.
the wavelength decreases and the frequency is unchanged.
the wavelength is unchanged and the frequency increases.
the wavelength is unchanged and the frequency decreases.
both the wavelength and the frequency change.
Answer: B

2. A33.1
When light passes from vacuum (index of refraction n = 1) into water (n = 1.333),
the wavelength increases and the frequency is unchanged.
the wavelength decreases and the frequency is unchanged.
the wavelength is unchanged and the frequency increases.
the wavelength is unchanged and the frequency decreases.
both the wavelength and the frequency change.

3. the refracted angle is greater than the incident angle.
Q33.2
Light passes from vacuum (index of refraction n = 1) into water (n = 1.333). If the incident angle is in the range 0° < < 90°,
the refracted angle is greater than the incident angle.
the refracted angle is equal to the incident angle.
the refracted angle is less than the incident angle.
two of A, B, and C are possible, depending on the specific value of .
all three of A, B, and C are possible, depending on the specific value of .
Answer: C

4. A33.2
Light passes from vacuum (index of refraction n = 1) into water (n = 1.333). If the incident angle is in the range 0° < < 90°,
the refracted angle is greater than the incident angle.
the refracted angle is equal to the incident angle.
the refracted angle is less than the incident angle.
two of A, B, and C are possible, depending on the specific value of .
all three of A, B, and C are possible, depending on the specific value of .

5. and the light speeds up as it enters the second medium.
Q33.3
Light passes from a medium of index of refraction na into a second medium of index of refraction nb. The angles of incidence and refraction are respectively. If na < nb,
and the light speeds up as it enters the second medium.
and the light slows down as it enters the second medium.
none of the above are true.
Answer: B

6. A33.3
Light passes from a medium of index of refraction na into a second medium of index of refraction nb. The angles of incidence and refraction are respectively. If na < nb,
and the light speeds up as it enters the second medium.
and the light slows down as it enters the second medium.
none of the above are true.

7. Q33.4
Light passes from a medium of index of refraction na into a second medium of index of refraction nb. The critical angle for total internal reflection is In order for total internal reflection to occur, what must be true about na, nb, and the incident angle ?
Answer: A

8. A33.4
Light passes from a medium of index of refraction na into a second medium of index of refraction nb. The critical angle for total internal reflection is qcrit. In order for total internal reflection to occur, what must be true about na, nb, and the incident angle qa?

9. Q33.5
Three polarizing filters are stacked with the polarizing axes of the second and third filters oriented at 45° and 90°, respectively, relative to the polarizing axis of the first filter. Unpolarized light of intensity I0 is incident on the first filter. The intensity of light emerging from the third filter is
Answer: E

10. A33.5
Three polarizing filters are stacked with the polarizing axes of the second and third filters oriented at 45° and 90°, respectively, relative to the polarizing axis of the first filter. Unpolarized light of intensity I0 is incident on the first filter. The intensity of light emerging from the third filter is

11. greater than the polarizing angle. equal to the polarizing angle.
Natural light is incident on the surface of a liquid. The reflected light will be completely polarized if the incident angle is
greater than the polarizing angle.
equal to the polarizing angle.
less than the polarizing angle.
more than one of A, B, and C is possible.
misleading question — the reflected light can never be completely polarized.
Answer: B

12. A33.6
Natural light is incident on the surface of a liquid. The reflected light will be completely polarized if the incident angle is
greater than the polarizing angle.
equal to the polarizing angle.
less than the polarizing angle.
more than one of A, B, and C is possible.
misleading question — the reflected light can never be completely polarized.

13. greater than the polarizing angle. equal to the polarizing angle.
Natural light is incident on the surface of a liquid. The transmitted (refracted) light will be completely polarized if the incident angle is
greater than the polarizing angle.
equal to the polarizing angle.
less than the polarizing angle.
more than one of A, B, and C is possible.
misleading question — the reflected light can never be completely polarized.
Answer: E

14. A33.7
Natural light is incident on the surface of a liquid. The transmitted (refracted) light will be completely polarized if the incident angle is
greater than the polarizing angle.
equal to the polarizing angle.
less than the polarizing angle.
more than one of A, B, and C is possible.
misleading question — the reflected light can never be completely polarized.

15. measured from the normal.
Q-RT33.1
Material a
Material b
A ray of light propagating in material a strikes the interface with material b at an angle
measured from the normal.
Rank the following situations in order of the angle of the refracted ray in material b, from greatest angle to smallest angle.
Normal
A. na = 1.0, nb = 1.5
B. na = 1.5, nb = 1.0
C. na = 1.5, nb = 2.0
D. na = 2.0, nb = 1.5
Answer: BDCA

16. measured from the normal.
A-RT33.1
Material a
Material b
A ray of light propagating in material a strikes the interface with material b at an angle
measured from the normal.
Rank the following situations in order of the angle of the refracted ray in material b, from greatest angle to smallest angle.
Normal
A. na = 1.0, nb = 1.5
B. na = 1.5, nb = 1.0
C. na = 1.5, nb = 2.0
D. na = 2.0, nb = 1.5
Answer: BDCA
Answer: BDCA