Quiz Questions Over Refraction
.
- 1.
As temperature increases, the index of refraction of air....
- A.
Increases
- B.
Decreases
- C.
Remains constant
- D.
Becomes negligible
Correct Answer
B. DecreasesExplanation
As temperature increases, the index of refraction of air decreases. This is because as the air molecules gain more thermal energy, they move faster and collide more frequently. These collisions disrupt the regular pattern of the molecules and cause them to scatter light more effectively, resulting in a lower index of refraction. Therefore, the speed of light decreases as it passes through air at higher temperatures.Rate this question:
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- 2.
The figure shows the path of a portion of a ray of light as it passes through three different materials. Note: The figure is drawn to scale. What can be concluded concerning the refractive indices of these three materials?
- A.
N1< n2< n3
- B.
N1> n2> n3
- C.
N3< n1< n2
- D.
N2< n1< n3
- E.
N1< n3< n2
Correct Answer
C. N3< n1< n2Explanation
when light moves from 1 to 2, it is refracted Towards the normal . so medium 2 has a higher RI. when light moves from medium 2 to 3, it is refracted Away from the normal. so medium 3 has a lower RI than medium 2.Compare ray 1 to ray 3. medium 3 should have a lower RI compared to medium 1 to moves away from the normal.Rate this question:
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- 3.
Refraction occurs when...
- A.
Light travels through the boundary of two media that have different indices of refraction
- B.
Light strikes the boundary of two media that have the same indices of refraction
- C.
The angle of incidence equals zero
- D.
The angle of reflection equals zero
Correct Answer
A. Light travels through the boundary of two media that have different indices of refractionExplanation
Refraction occurs when light travels through the boundary of two media that have different indices of refraction. This is because the speed of light changes when it passes from one medium to another with a different refractive index. This change in speed causes the light to bend or change direction, which is known as refraction. When the indices of refraction are different, the light rays are bent towards or away from the normal, depending on the angle of incidence.Rate this question:
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- 4.
When light travels from one medium into a medium with a lower index of refraction...
- A.
The speed of the light increases
- B.
The angle of refraction is smaller than the angle of incidence
- C.
The refracted light bends towards the normal
- D.
The angle of incidence equals the angle of refraction
Correct Answer
A. The speed of the light increasesExplanation
lower index of refraction means higher speed, larger wavelength ( frequency does not change)Rate this question:
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- 5.
The index of refraction of transparent mineral beryl is 1.6. Transparent Quartz has an index of refraction of 1.54, while diamond has an index of refraction of 2.42. Based on these facts, which of the following statements is true?
- A.
All three minerals bend light to the same extent
- B.
Quartz bends light more than beryl does
- C.
Beryl bends light more than quartz does
- D.
Both beryl and quartz bend light more than diamond does
Correct Answer
C. Beryl bends light more than quartz doesExplanation
Based on the given information, the index of refraction of beryl is 1.6 and the index of refraction of quartz is 1.54. The index of refraction measures how much a material bends light when it enters the material. A higher index of refraction indicates a stronger bending of light. Since the index of refraction of beryl is higher than that of quartz (1.6 > 1.54), it means that beryl bends light more than quartz does. Therefore, the statement "beryl bends light more than quartz does" is true.Rate this question:
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- 6.
Light passes from medium 1 to medium 2 and bends along the path between points A and B as shown below. Which of the following statements is correct?
- A.
Medium 1 is more dense than medium 2
- B.
Medium 1 is less dense than medium 2
- C.
The speed of the light in medium 1 is greater than the speed of the light in medium 2
- D.
The frequency of the light in medium 1 is greater than the frequency of the light in medium 2
- E.
The wavelength is the same in medium 1 and medium 2
Correct Answer
A. Medium 1 is more dense than medium 2Explanation
more dense, less speed
light passes from medium 1 with low speed, to medium 2 with high speed
bends away from the normalRate this question:
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- 7.
A beam of light is incident onto a glass plate. Possible angles for the reflected and refracted rays are drawn in the figure below. Which of the rays best represents the refracted ray?
- A.
A
- B.
B
- C.
C
- D.
D
- E.
E
Correct Answer
A. AExplanation
From air to glass ( low to high refractive index) light bends towards the normal ( fast to slow)Rate this question:
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- 8.
A ray of light is shined from beneath the water to the air above the water as shown. Which of the following rays is the refracted ray?
- A.
AB
- B.
BD
- C.
BF
- D.
BC
- E.
BE
Correct Answer
E. BEExplanation
light moves from high refractive index to low refractive index ( slow to fast)
light bends AWAY from the normalRate this question:
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- 9.
A beam of light passes from air into glass. Which of the following statements is true?
- A.
The angle of incidence is greater than the angle of refraction in the glass
- B.
The angle of incidence is less than the angle of refraction in the glass
- C.
The angle of incidence is equal to the angle of refraction in the glass
- D.
The frequency of the light decreases
- E.
The frequency of the light increases.
Correct Answer
A. The angle of incidence is greater than the angle of refraction in the glassExplanation
light bends towards the normal, so angle of refraction is less than angle of icidenceRate this question:
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- 10.
A beam of light traveling in medium 1 strikes the interface to another transparent medium 2. If the speed of light is less in medium 2 than in medium 1, the beam will…
- A.
Refract towards the normal
- B.
Refract away from the normal
- C.
Undergo total internal reflection
- D.
Have an angle of reflection smaller than the angle of incidence
- E.
Have an angle of reflection greater than the angle of incidence
Correct Answer
A. Refract towards the normalExplanation
When light travels from a medium with a higher speed to a medium with a lower speed, it bends towards the normal line at the interface. This phenomenon is known as refraction. Therefore, the correct answer is that the beam of light will refract towards the normal.Rate this question:
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- 11.
A ray of light goes obliquely from water to glass. The angle of incidence in the water is θ1, the angle of refraction in the glass is θ2, the index of refraction of water is n1 and the index of refraction of glass in n2.Which of the following is a correct relationship for this case?
- A.
n1 sin θ1 = sin θ2
- B.
N1 sin θ2 = sin θ1
- C.
N2 sin θ1 = sin θ2
- D.
N2 sin θ2 = sin θ1
- E.
n2 sin θ2 = n1 sin θ1
Correct Answer
E. n2 sin θ2 = n1 sin θ1Explanation
Snell's LawRate this question:
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- 12.
A ray of light passes through a piece of glass at the angle of incidence shown below. As the light passes through the glass and exits the glass into the air, the path of the ray is represented by which of the rays shown?
- A.
A
- B.
B
- C.
C
- D.
D
- E.
E
Correct Answer
D. DExplanation
The ray of light will bend away from the normal as it passes from a denser medium (glass) to a less dense medium (air). This bending of light is known as refraction. Among the given options, only ray D shows the correct path of the ray as it bends away from the normal upon exiting the glass into the air.Rate this question:
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- 13.
A flashlight beam is directed at a swimming pool in the dark at an angle of 46° with respect to the normal to the surface of the water. What is the angle of refraction of the beam in the water? (The refractive index for water is 1.33.)
- A.
18°
- B.
30°
- C.
33°
- D.
44°
- E.
54°
Correct Answer
C. 33° -
- 14.
Light traveling in a medium of index of refraction n1 is incident on another medium having an index of refraction n2 Under which of the following conditions can total internal reflection occur at the interface of the two media?
- A.
The indices of refraction have the relation n2 > n1
- B.
The indices of refraction have the relation n1 > n2
- C.
Light travels slower in the second medium than in the first.
- D.
The angle of incidence is less than the critical angle.
- E.
The angle of incidence must equal the refraction angle
Correct Answer
B. The indices of refraction have the relation n1 > n2Explanation
for total internal reflection to occur:
- light must travel form a higher refractive index to lower refractive index
- angle of incidence must be greater than critical angleRate this question:
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- 15.
A beam of light passes from a thick piece of glass into the air as shown. Which of the following angles is the angle of refraction?
- A.
1
- B.
2
- C.
3
- D.
4
- E.
5
Correct Answer
B. 2Explanation
The angle of refraction is the angle at which a beam of light bends when it passes from one medium to another. In this case, the beam of light is passing from a thick piece of glass into the air. The correct answer is 2 because it is the angle at which the beam of light is bending as it passes from the glass into the air.Rate this question:
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- 16.
The speed of light in a certain transparent substance is two-fifths of its speed in air. The index of refraction of this substance is…
- A.
0.4
- B.
1.4
- C.
2.0
- D.
2.5
- E.
5.0
Correct Answer
D. 2.5 -
- 17.
The speed of light in a piece of crown glass is 2 x 108 m/s. What is the index of refraction of crown glass?
- A.
2
- B.
1.5
- C.
0.67
- D.
0.33
- E.
0.2
Correct Answer
B. 1.5 -
- 18.
A small beam of light shines on a glass plate with plane parallel surfaces. The index of refraction of glass is 1.60. The angle of incidence of the light is 300. The angle of emergence of the light from the glass is…
- A.
18 degrees
- B.
30 degrees
- C.
45 degrees
- D.
48 degrees
- E.
60 degrees
Correct Answer
B. 30 degreesExplanation
If the incident rays and the emergent rays are in the same medium ( in this case- air) then the angle of incidence = angle of refraction. ( both rays will be parallel but slightly shiftedRate this question:
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- 19.
Which diagram correctly shows a ray of light passing through a rectangular glass block?
- A.
A
- B.
B
- C.
C
- D.
D
Correct Answer
A. AExplanation
At the when light enters the glass, the refracted ray bends towards the normal
when this ray now moves out of the glass into air, the refracted ray ( at the second surface) bends away from the normal)Rate this question:
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.jpg "A beam of light is incident onto a glass plate. Possible angles for the reflected and refracted rays are drawn in the figure below.
Which of the rays best represents the refracted ray?")
.jpg "A ray of light passes through a piece of glass at the angle of incidence shown below. As the light passes through the glass and exits the glass into the air, the path of the ray is represented by which of the rays shown?")
.jpg "A beam of light passes from a thick piece of glass into the air as shown.
Which of the following angles is the angle of refraction?")
.jpg "Which diagram correctly shows a ray of light passing through a rectangular glass block?")
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Current Version
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Mar 22, 2023Quiz Edited by
ProProfs Editorial Team -
May 05, 2013Quiz Created by
Denise_nambiar21
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