Refraction of Light and Snell's Law

What is the speed of light in a vacuum?

• 3.0 x 10⁸ m/s

• 1.0 x 10⁸ m/s

• 10 m/s

• 5.0 x 10⁸ m/s

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NGSS.HS-PS4-1

What is the speed of light in a material that has an index of refraction of 1.88?

• 3.0 x 10⁸ m/s

• 1.88 x 10⁸ m/s

• 1.6 x 10⁸ m/s

• 5.64 x 10⁸ m/s

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If a material has an index of refraction of 2.3, how fast will light travel through that material?

• 2.3 x 10⁸ m/s

• 6.9 x 10⁸ m/s

• 3.0 x 10⁸ m/s

• 1.3 x 10⁸ m/s

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If light travels through a piece of glass at 2.1 x 10⁸ m/s, what is the index of refraction of the glass?

• 1.14

• 1.43

• 2.10

• 6.3

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NGSS.HS-PS4-5

Light travels from air (n = 1.00) into a "mystery" material. The incident ray of light hits the surface at angle of 43^o and the refracted ray enters the mystery material at an angle of 27^o. What is the index of refraction of the mystery material? n₁sin(Θ₁) = n₂sin(Θ₂)

• 1.5

• 1.0

• 0.67

• 2.1

Light travels from air (n = 1.00) into a second material. The incident ray of light hits the surface at angle of 64^o and the refracted ray enters the second material at an angle of 32^o. What is the index of refraction of the second material? n₁sin(Θ₁) = n₂sin(Θ₂)

• 1.4

• 0.90

• 0.53

• 1.7

Light travels from air (n = 1.00) into a glass block that has an index of refraction of 1.46. The incident ray of light hits the surface at angle of 45^o. At what angle will the light ray enter the glass? n₁sin(Θ₁) = n₂sin(Θ₂)

• 45^o

• 29^o

• 31^o

• 64^o

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