Question 25 If a ray of light hits a mirror with an angle of incidence of 20° what is the angle of reflection? 40° O 120° О 30° O 20° Question 26 When violet light enters a prism it bends toward the normal a lot more than red light, this is because violet light travels slower than red light inside the prism O violet light travels faster than red light inside the prism

Question 25 If a ray of light hits a mirror with an angle of incidence of 20° what is the angle of reflection? 40° O 120° О 30° O 20° Question 26 When violet light enters a prism it bends toward the normal a lot more than red light, this is because violet light travels slower than red light inside the prism O violet light travels faster than red light inside the prism

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter38: Refraction And Images Formed By Refraction

Section: Chapter Questions

Problem 8PQ: A ray of light enters a liquid from air. If the angle between the incident and refracted rays is 150...

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A light ray initially in water enters a transparent substance at an angle of incidence of 37.0, and the transmitted ray is refracted at an angle of 25.0. Calculate the speed of light in the transparent substance.
The index of refraction for water is about 43. What happens as a beam of light travels from air into water? (a) Its speed increases to 43c, and its frequency decreases. (b) Its speed decreases to 34c, and its wavelength decreases by a factor of 34. (c) Its speed decreases to 34c, and its wavelength increases by a factor of 43. (d) Its speed and frequency remain the same. (e) Its speed decreases to 34c, and its frequency increases.
What happens to a light wave when it travels from air into glass? (a) Its speed remains the same. (b) Its speed increases. (c) Its wavelength increases. (d) Its wavelength remains the same. (e) Its frequency remains the same.
Light passes from a material with index of refraction 1.3 into one with index of refraction 1.2. Compared with the incident ray, what happens to the refracted ray? (a) It bends toward the normal. (b) It is undeflected. (c) It bends away from the normal.
A light ray initially in water enters a transparent substance at an angle of incidence of 37.0, and the transmitted lay is refracted at an angle of 25.0. Calculate the speed of light in the transparent substance.
A ray of light enters a liquid from air. If the angle between the incident and refracted rays is 150 and the angle between the reflected and refracted rays is 60, find the refractive index of the liquid. Assume the refractive index of air is 1.00.
A 4.00-m-long pole stands vertically in a freshwater lake having a depth of 2.00 m. The Sun is 40.0° above the horizontal. Determine the length of the pole’s shadow on the bottom of the lake.
A narrow beam of light is incident from air onto a glass surface with index of refraction 1.56. Find the angle of incidence for which the corresponding angle of refraction is one-half the angle of incidence. Hint: You might want to use the trigonometric identity sin 2 = 2 sin cos .
The angle of incidence of a light beam onto a reflecting surface is continuously variable. The reflected ray in air is completely polarized when the angle of incidence is 48.0. What is the index of refraction of the reflecting material?
A scuba diver training in a pool looks at his instructor as shown in Figure 25.53. What angle does the ray from the instructor’s face make with the perpendicular to the water at the point where the ray enters? The angle between the ray in the water and the perpendicular to the water is 25.0°. Figure 25.53 A scuba diver in a pool and his trainer look at each other.
The angle of incidence of a light beam in air onto a reflecting surface b continuously variable. The reflected ray is found to be completely polarized when the angle of incidence is 48.0. (a) What is the index of refraction of the reflecting material? (b) If some of the incident light (at an angle of 48.0) passes into the material below the surface, what is the angle of refraction?