Snells law and refraction

If the index of refraction of a certain material is 𝑛 = 2, the speed of light in this material is ________.

• 6.7 × 10⁷ 𝑚/𝑠

• 1.5×10⁸𝑚/𝑠

• 3.0×10⁸𝑚/𝑠

• 6.0 × 10⁸ 𝑚/𝑠

Index of refraction, n in air = 1

• True

• False

Speed of light, C in air

• 3.0 × 10⁸ 𝑚/𝑠

• 1.0 × 10⁸ 𝑚/𝑠

• 1.5 × 10⁸ 𝑚/𝑠

• 6.0 × 10⁸ 𝑚/𝑠

Which of the following is true regarding the index of refraction of a substance?

• 𝑛 = 𝑐/𝑣

• 𝑛 = 𝑣/𝑐

• 𝑛 = 𝑐𝑣

• 𝑛 = 𝑐+𝑣

The diagram below shows a ray of monochromatic light incident on a boundary between air and glass. Which of the letters represent the path after it strikes the glass?

• A

• B

• C

• D

Light passes from air into a block of glass, as shown below. Which expression is equal to the refractive index of glass?

• sin Y / sin W

• sin Z / sin X

• sin W / sin Z

• sin W / sin Y

A ray of light traveling through a block of an unknown material, passes at an angle of incidence of 30° into air, as shown in the diagram below.What is the angle of refraction?

• 60°

• 90°

• 30°

• 10°

The figure below shows the ray striking the air-glass boundary.Calculate the angle of refraction of the ray of light in the flint glass ; index of refraction of glass is given as 1.66?

• 30°

• 90°

• 60°

• 35°

Light travels through a glass block as shown below. Which angle is the critical angle for light in the glass?

• A

• B

• C

• D

Three rays of light are incident on the boundary between a glass block and air. The angles of incidence are different.What is the possible critical angle for light in the glass?

• 15°

• 20°

• 50°

• 45°