Refraction and Snell's Law Quiz
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Questions and Answers

What is the index of refraction for the material mentioned?

  • 1.13 (correct)
  • 1.0
  • 2.42
  • 1.50

    • The angle of incidence from air is 60° and the angle of refraction is 50°.

    True

    What is the critical angle for diamond when entering air?

    24.4°

    The angle of refraction when light enters the material from air is _____°.

    <p>37.7</p> Signup and view all the answers

    Match the following angles with their corresponding phenomena:

    <p>16.7° = Refraction at a given angle 50° = Angle of refraction from air of 60° 24.4° = Critical angle of diamond 37.7° = Angle of refraction in the material</p> Signup and view all the answers

    What is the critical angle in the context of refraction according to the given information?

    <p>62.5°</p> Signup and view all the answers

    The index of refraction for ruby is less than that of water.

    <p>False</p> Signup and view all the answers

    What is the angle of refraction when light travels from water into ruby at an angle of 50°?

    <p>35°</p> Signup and view all the answers

    The index of refraction for jade is _____

    <p>1.61</p> Signup and view all the answers

    Match the materials with their corresponding indices of refraction:

    <p>Water = 1.33 Ruby = 1.78 Air = 1.00 Jade = 1.61</p> Signup and view all the answers

    If the angle of incidence is 75°, which of the following statements is true?

    <p>There is no refraction.</p> Signup and view all the answers

    Calculate the index of refraction for ruby if the angle of refraction is 35° when light enters from another medium.

    <p>1.78</p> Signup and view all the answers

    The refractive index of a lens in the human eye is 1.41.

    <p>True</p> Signup and view all the answers

    What is the formula used to calculate the angle of refraction in Snell's Law?

    <p>n1 * sin(θ1) = n2 * sin(θ2)</p> Signup and view all the answers

    The index of refraction is defined as the ratio of the speed of light in vacuum to the speed of light in a medium.

    <p>True</p> Signup and view all the answers

    If a laser beam travels from water (n = 1.33) into air (n = 1.00) at an incidence angle of 50°, what is the index of refraction of the medium being entered?

    <p>1.00</p> Signup and view all the answers

    The angle of incidence is 60° and the index of refraction in air is 1.00. The index of refraction in water is __________.

    <p>1.33</p> Signup and view all the answers

    Match the following angles with their corresponding indices of refraction:

    <p>Air = 1.00 Water = 1.33 Cubic Zirconia = 2.24 Diamond = 2.42</p> Signup and view all the answers

    What is the angle of refraction when a light ray enters water from air at an angle of incidence of 60°?

    <p>40.6°</p> Signup and view all the answers

    What is the angle of incidence when a light ray passes from water (n = 1.33) into flint glass (n = 1.61) and refracts at an angle of 47°?

    <p>55.6°</p> Signup and view all the answers

    When light passes from a medium with a higher index of refraction to a lower index, the angle of refraction is always smaller than the angle of incidence.

    <p>True</p> Signup and view all the answers

    Light always bends towards the normal when moving from a medium of higher index of refraction to one of lower index of refraction.

    <p>False</p> Signup and view all the answers

    If the index of refraction of cubic zirconia is 2.24 and the angle of incidence is 50°, what is the angle of refraction?

    <p>27°</p> Signup and view all the answers

    What is the critical angle for a light ray transitioning from air (n = 1.00) to glass (n = 1.45)?

    <p>43.6°</p> Signup and view all the answers

    The critical angle is defined as the angle of incidence that results in the angle of refraction equal to ______.

    <p>90°</p> Signup and view all the answers

    If a light ray is passing from plastic (n = 1.5) to water (n = 1.33), how would you describe this transition?

    <p>it bends away from the normal</p> Signup and view all the answers

    Total internal reflection occurs when the angle of refraction is less than the critical angle.

    <p>False</p> Signup and view all the answers

    What is the index of refraction if the critical angle is 55° when light is moving from the substance to air?

    <p>1.64</p> Signup and view all the answers

    Match the following conditions with the appropriate phenomena:

    <p>Angle of incidence = Critical angle = Total Internal Reflection Light moving from higher n to lower n = Bends Away from Normal Angle of refraction = 90° = Critical Angle Angle of incidence &gt; Critical angle = Light Reflects Completely</p> Signup and view all the answers

    Study Notes

    Refraction - Snell's Law & Extensions

    • Snell's Law describes the relationship between the angle of incidence and the angle of refraction when light passes from one medium to another. Mathematically, it's expressed as n₁sinθ₁ = n₂sinθ₂ where n₁ and n₂ are the refractive indices of the two media, and θ₁ and θ₂ are the angles of incidence and refraction, respectively.

    • Refractive index is a dimensionless number that describes how light travels through a medium. It provides a quantitative measure of how much a medium slows down the speed of light.

    • Snell's law allows calculation of the angle of refraction given the angle of incidence and the refractive indices of the two media. This principle is used in various applications like lenses and prisms.

    Examples of Snell's Law Calculations

    • Example 1: A laser beam passes from water to a cubic zirconia block. The angle of incidence is 50° and the angle of refraction is 27°. Calculate the index of refraction of cubic zirconia.

    • Calculation: Given: n₁ = 1.33 (index of water), θ₁ = 50°, θ₂ = 27°; Solving for n₂ gives: n₂ = 2.24.

    Snell's Law Extensions

    • When light moves from a medium with a high refractive index to a medium with a lower refractive index (e.g., from a denser medium to a rarer medium), it bends away from the normal.

    • Increasing the angle of incidence can cause the light to refract parallel to the surface. It might not actually enter the new medium.

    Critical Angle and Total Internal Reflection

    • Critical angle (θc): The angle of incidence (θ₁) that results in an angle of refraction (θ₂) of 90°.

    • Total internal reflection: Occurs when the angle of incidence is greater than the critical angle. The light is entirely reflected back into the original medium.

    • Examples illustrate calculation of critical angles in different scenarios.

    Practice Questions

    • Question 1: Calculating angle of refraction (given index of refraction and angle of incidence).

    • Question 2: Determining the refractive index of a material (given angles of incidence and refraction).

    • Question 3: Determining the critical angle or angle of refraction when light passes from one material to another (e.g. from plastic into water). Variations include different angles of incidence, or finding the unknown refractive index of a material.

    • Question 4: Calculating the angle of refraction, when light passes through jade; where refractive indices and angle of incidence are given.

    • Question 5: Calculations on refraction of light through a transparent material. It involves identifying the material using refractive index calculation.

    • Question 6: Calculating refraction of light for a material, given the angle of incidence and refraction.

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    Related Documents

    Refraction - Snell's Law & Extensions PDF

    Description

    Test your understanding of Snell's Law and its applications in optics. This quiz covers the relationship between angle of incidence and refraction, refractive indices, and includes sample calculations. Strengthen your knowledge of light behavior in different media.

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