3.9 Refraction at a plane surface

    Cards (39)

    • What is refraction?
      The bending of light
    • During refraction, the frequency of light remains constant.

      True
    • The formula for Snell's Law is \frac{\sin(\theta_1)}{\sin(\theta_2)} = \frac{n_2}{n_1}</latex> where θ1\theta_{1} is the angle of incidence
    • How is the refractive index defined?
      Ratio of light speed in vacuum to light speed in medium
    • What is the refractive index of air?
      1.0003
    • The higher the refractive index, the more the speed of light is reduced in that medium.

      True
    • What do θ1\theta_{1} and θ2\theta_{2} represent in Snell's Law?

      Angles of incidence and refraction
    • Why does light refract when it passes from one medium to another?
      Change in the speed of light
    • <statement_start>v1v_{1} and v2v_{2} represent the speeds of light in the two media
    • What is the definition of refraction?
      Bending of light
    • Snell's Law is expressed as \frac{\sin \theta_{1}}{\sin \theta_{2}} = \frac{n_{2}}{n_{1}}</latex>
      True
    • Snell's Law states that the ratio of the sines of the angles of incidence and refraction is equal to the ratio of the refractive indices of the two media.
      False
    • What is the definition of the refractive index?
      Ratio of light speeds
    • The refractive index is a dimensionless quantity.
      True
    • What is the symbol for the refractive index?
      n
    • When light passes from one medium to another with different refractive indices, it undergoes refraction
    • The frequency of light changes when it passes from one medium to another.
      False
    • What is total internal reflection used in?
      Fiber optics
    • To solve problems using Snell's Law, the formula must be rearranged
    • Refraction occurs because the speed of light differs
    • What does Snell's Law state?
      Ratio of sines equals inverse ratio of refractive indices
    • Snell's Law governs how light bends when it passes from one medium to another.

      True
    • The formula for refractive index is n=n =cv \frac{c}{v} where cc is the speed of light in a vacuum
    • Match the material with its refractive index:
      Water ↔️ 1.33
      Glass ↔️ 1.5-1.9
      Diamond ↔️ 2.42
    • When light passes from one medium to another, its frequency remains constant
    • The speed of light changes when it passes from one medium to another.
      True
    • What are θ1\theta_{1} and θ2\theta_{2} referred to as in the context of refraction?

      Angles of incidence and refraction
    • n1n_{1} and n_{2}</latex> denote the refractive indices of the two media.

      True
    • <statement_start>In refraction, the frequency of light remains constant
    • What does θ1\theta_{1} represent in Snell's Law?

      Angle of incidence
    • <statement_start>Snell's Law involves the ratio of the sines of the angles of incidence and refraction
    • Match the term with its description:
      θ1\theta_{1} ↔️ Angle of incidence
      θ2\theta_{2} ↔️ Angle of refraction
      n1n_{1} ↔️ Refractive index of medium 1
      n2n_{2} ↔️ Refractive index of medium 2
    • <statement_start>The formula for the refractive index is n=n =cv \frac{c}{v}, where cc is the speed of light in a vacuum
    • What does the refractive index measure?
      Reduction in light speed
    • The higher the refractive index, the more the speed of light is reduced in that medium.

      True
    • What law governs the behavior of light as it passes between two media?
      Snell's Law
    • The critical angle is the angle of incidence at which the angle of refraction is 90 degrees.
    • Total internal reflection occurs when light travels from a denser medium to a less dense medium at an angle greater than the critical angle.
      True
    • What is the approximate angle of refraction when light travels from air to glass at an angle of incidence of 30 degrees?
      19.5 degrees
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