At noon, the sun is above you and you want to create artificial rainbows. You bring out a water spray, and sprayed in front of you. To see the artificial rainbows, spray such that a. the angle between the horizon, and the line connecting your eyes and mist is around 41 degrees b. the angle between the horizon, and the line connecting your eyes and mist is around 59 degrees
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- When looking up from under water, you can see out of the water only through a circular "window" as shown here. Which of the following statements about this phenomenon is FALSE? You can still be seen by people above the water, even if they are above the dark part O You can only see what is directly above the circle You see this effect looking up from under water, but not looking down from above water O The dark part in the picture is actually a reflection of under the waterA1. As shown in Figure A1, a light ray is incident normal to one face of a 30°-60°-90° prism (n = 1.50) that is immersed in water (n = 1.33). Determine the exit angle 03. (a) Determine the exit angle 03. (b) Determine the critical angle for the prism-water system. n2 60.0° n1 Figure Al 021 30.0% D 103Problem 85. A light ray is incident upon a transparent parallel plate of index of refraction 1.52 at an angle of 40° as shown below. A) Sketch the path of the ray through the plate and exiting the plate. B) Find the angle of refraction in the plate at the entry into the plate. C) Find the angle of refraction in the air at the exit from the plate. Air Plate Air 40 1
- An observer attempts to see a rainbow toward the end of a rainstorm when the sun shows through a break in the clouds. Which of the following conditions will not contribute to making the rainbow visible? a. The observer must face the sun with his back to the rain clouds. b. The observer must face the rain clouds with his back to the sun. c. The light from the sun must reflect off the backs of the water droplets in the rain clouds at angles greater than the critical angle for total internal reflection. d. The observer must be sufficiently far from the clouds to be able to see the color separation due to dispersion. e. The index of refraction of any material, including water, must be frequency dependent.Suppose you have an unknown clear substance immersed in water, and you wish to identify it by finding its index of refraction. You arrange to have a beam of light enter it at an angle of 45.0° with respect to the normal, and you observe the angle of refraction to be 40.3°. A. What is the index of refraction of the substance? B. What is its likely identity?An olive is at the bottom of a glass of alcohol (n = 1.36), 6.00 cm beneath the surface. Above the alcohol is air. To a person in the air, who is directly above the olive, what is the apparent depth d' of the olive. d' = Number i Units