Exam 22: Reflection and Refraction of Light

An optical fiber is 1.00 meter long and has a diameter of 20.0 $\mu$ m. Its ends are perpendicular to its axis. Its index of refraction is 1.30. What is the minimum number of reflections a light ray entering one end will make before it emerges from the other end?

My flashlight beam makes an angle of 60. degrees with the surface of the water before it enters the water. In the water what angle does the beam make with the surface?

When a ray of light passes obliquely from one medium to another, which of the following changes?

A light beam composed of red and blue light is incident upon a rectangular glass plate, as shown in Figure 22-2. The light emerges into the air from point P as two separate beams

A light beam enters water at an angle of incidence of 37°. Determine the angle of refraction.

Red light with a wavelength of 650. nm travels from air into a liquid with an index of 1.33. What is the frequency and wavelength in the liquid?

An index of refraction less than one for a medium would imply that

Light in a transparent material (index of refraction 1.333) strikes the boundary with another transparent material (n = 1.010). (a) What is the critical angle for total internal reflection? (b) By what percent does the wavelength change going from the 1st to the 2nd material?

A point source of light is positioned 20.0 m below the surface of a lake. What is the diameter of the largest circle on the surface of the water through which light can emerge?

A buoy, used to mark a harbor channel, consists of a weighted rod 2.00 m in length. 1.50 m of the rod is immersed in water and 0.500 m extends above the surface. If sunlight is incident on the water with an angle of incidence of 40.0°, what is the length of the shadow of the buoy on the level bottom of the harbor?

The critical angle is given by sin_c (1/n₁) for what condition?

The color on the outer edge of the primary rainbow is

An oil layer that is 5.0 cm thick is spread smoothly and evenly over the surface of water on a windless day. What is the angle of refraction in the water for a ray of light that has an angle of incidence of 45° as it enters the oil from the air above? (The index of refraction for oil is 1.15, and for water it is 1.33.)

The speed of light in a certain medium is 2.2 x 10⁸ m/s. What is the index of refraction of this medium?

You can only see a rainbow if

Which of the following materials has the slowest speed of light?

For certain angles, TOTAL INTERNAL REFLECTION can occur when light tries to pass from one medium to another which has

The index of refraction of a certain medium is 1.5. What is the speed of light in that medium?

When a light wave enters into a medium of different optical density

A ray of light (inc) enters a 45° - 90° glass prism from air (bottom left), as shown in Figure 22-3. In what direction does the light re-emerge back into the air?