Reflection and Snell's law

Is the line that is perpendicular to the separation of the 2 media.

• refractive angle line

• Boundary line

• Incident angle line

• Normal Line

Refraction of any wave is ...

• just when any wave slows down

• When incident angle is reflected completely

• just when any wave slows down and changes its direction

• When incident angle slows down

If light travels from a higher to a lower index of refraction medium the light will

• bend away from the vertical axis or may not refract

• bend closer to the vertical axis

• not bend

• answer is not here

If light travels from a lower to a higher index of refraction medium the light will

• bend away from the vertical axis

• bend closer to the vertical axis

• not bend

• answer is not here

A higher index of refraction means that the wave travels _____________ the speed of light in a vacuum in that medium.

• Faster than

• Slower than

• Equal to

• Answer is not here

Light travels from air (n = 1.000) into an optical fiber. If the angles of incidence and refraction are 22^oand 15º respectively. what is the index of refraction inside the fiber? Round off your values to 3 sig. figs.

• 1.45

• 1.44

• 0.69

• 0.70

The index of refraction, is defined as the ratio of the speed of light in a vacuum (c = 3x10^8 m/s) to the speed of light in a medium. What is the index of refraction of a medium where the speed of light is 0.7c ? Round off your values to 3 sig. figs.

• 1.42

• 1.43

• 1.28

• 1.29

There are certain angles of incidence for which the angle of refraction is close to 90°. What is this angle called?

• Total internal angle

• Critical angle

• Reflection angle

• Refracted angle

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

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