6.3.2 Refraction of Waves

Cards (43)

  • Refraction occurs when waves pass from one medium to another with a different refractive index
  • As density increases, wave speed decreases
  • Waves require more energy to travel through denser materials.

    True
  • What does Snell's Law describe?
    Wave bending
  • Match the symbol in Snell's Law with its meaning:
    \( n_1 \) ↔️ Refractive index of medium 1
    \( n_2 \) ↔️ Refractive index of medium 2
    \( \theta_1 \) ↔️ Angle of incidence
    \( \theta_2 \) ↔️ Angle of refraction
  • When a wave passes from a lower refractive index medium to a higher one, it bends towards the normal.

    True
  • What is the definition of refraction?
    The bending of waves
  • Match the factor with its effect on refraction:
    Angle of Incidence ↔️ The angle at which the wave hits the boundary
    Speed of Wave ↔️ The speed of the wave changes
    Refractive Index ↔️ How much the speed is reduced
  • A wave bends towards the normal when passing from a medium with a higher refractive index to a lower refractive index.
    False
  • What is the relationship between wave speed and density?
    Inversely related
  • Match the density with the wave speed:
    Lower density ↔️ Higher speed
    Higher density ↔️ Lower speed
  • The formula for Snell's Law is n_1 \sin \theta_1 = n_2 \sin \theta_2</latex>
  • If light travels from air (\( n_1 = 1 \)) to glass (\( n_2 = 1.5 \)) at an angle of incidence \( \theta_1 = 30^\circ \), what is the angle of refraction \( \theta_2 \) approximately?
    19.47∘19.47^\circ
  • How does a wave bend when it passes from a medium with a higher refractive index to one with a lower refractive index?
    Away from the normal
  • Steps in applying Snell's Law
    1️⃣ Identify the refractive indices of both media
    2️⃣ Measure the angle of incidence
    3️⃣ Apply the formula: n1sin⁡θ1=n_{1} \sin \theta_{1} =n2sin⁡θ2 n_{2} \sin \theta_{2}
    4️⃣ Calculate the angle of refraction
  • When a wave passes from a lower to a higher refractive index, it bends towards the normal.
    True
  • What happens to a wave's direction when it moves from a higher to a lower refractive index medium?
    Bends away from the normal
  • Light traveling from air to glass at an incidence angle of 30∘30^\circ will have an angle of refraction of approximately 19.47^\circ</latex>.

    True
  • Match the variable in Snell's Law with its meaning:
    n_1 ↔️ Refractive index of the first medium
    \theta_2 ↔️ Angle of refraction
  • What is the relationship between wave speed and density of a medium?
    Inversely related
  • Refraction occurs when waves pass from one medium to another with a different frequency.
    False
  • Match the density of the medium with its effect on wave speed:
    Lower density ↔️ Higher speed
    Higher density ↔️ Lower speed
  • As the density of a medium increases, the wave speed decreases.

    True
  • What does Snell's Law describe?
    Light wave bending
  • The formula for Snell's Law is n_{1} \sin \theta_{1} = n_{2} \sin \theta_{2}.
  • Refraction occurs when waves pass from one medium to another with a different refractive index.
  • What happens to a wave when it undergoes normal incidence?
    It does not bend
  • Match the real-life scenario with its application of Snell's Law:
    Prism ↔️ Separates white light into colors
    Lenses in Eyeglasses ↔️ Focus light to create images
    Rainbow Formation ↔️ Refraction of sunlight through water
  • What two factors are adjusted in Snell's Law to control the path of light?
    Angle of incidence and refractive index
  • The wave speed is inversely related to the density
  • Match the term with its definition:
    Refractive index ↔️ Ratio of wave speeds in a medium compared to a vacuum
    Angle of incidence ↔️ Angle at which a wave hits the boundary
  • Snell's Law states that n_{1} \sin \theta_{1} = n_{2} \sin \theta_{2}</latex>, where <tex>n1n_{1}</tex> is the refractive index of the first medium
  • In Snell's Law, <tex>θ1\theta_{1}</tex> represents the angle of incidence
  • What happens to the wave speed as the density of the medium increases?
    Decreases
  • Steps to calculate the angle of refraction using Snell's Law
    1️⃣ Identify the refractive indices of both media
    2️⃣ Measure the angle of incidence
    3️⃣ Apply Snell's Law: n1sin⁡θ1=n_{1} \sin \theta_{1} =n2sin⁡θ2 n_{2} \sin \theta_{2}
    4️⃣ Solve for <tex>θ2\theta_{2}</tex>
    5️⃣ Calculate the value of <tex>arcsin⁡(θ2)\arcsin(\theta_{2})</tex>
  • Snell's Law describes the relationship between the angles of incidence and refraction
  • What is the effect of the angle of incidence on refraction?
    Affects the degree of bending
  • The wave speed is inversely related to the density of the medium.
  • Match the variable in Snell's Law with its meaning:
    \(n_1\) ↔️ Refractive index of the first medium
    \(\theta_1\) ↔️ Angle of incidence
    \(n_2\) ↔️ Refractive index of the second medium
    \(\theta_2\) ↔️ Angle of refraction
  • What is the angle of refraction when light travels from air (\(n_1 = 1\)) to glass (\(n_2 = 1.5\)) at an angle of incidence of \(30^\circ\)?
    19.47^\circ