33. Geometric Optics
Refraction of Light & Snell's Law
- Multiple ChoiceA light ray, moving in air, is incident on a piece of plastic at an angle of 23° with respect to the normal. Inside the plastic the ray travels at an angle of 16° with respect to the normal. What is the index of refraction of the plastic?3views
- Textbook Question
A triangular prism made of crown glass (n = 1.52) with base angles of 26.0° is surrounded by air. If parallel rays are incident normally on its base as shown in Fig. 32–66, what is the angle Φ between the two emerging rays?
1views - Textbook Question
A person is lying on a diving board 3.00 m above the surface of the water in a swimming pool. She looks at a penny that is on the bottom of the pool directly below her. To her, the penny appears to be a distance of 7.00 m from her. What is the depth of the water at this point?
3views - Textbook Question
A beam of white light enters a transparent material. Wavelengths for which the index of refraction is n are refracted at angle θ₂. Wavelengths for which the index of refraction is n + δn, where δn << n, are refracted at angle θ₂ + δθ. A beam of white light is incident on a piece of glass at 30°. Deep violet light is refracted 0.28° more than deep red light. The index of refraction for deep red light is known to be 1.552. What is the index of refraction for deep violet light?
- Textbook Question
A coin lies at the bottom of a 0.95-m-deep pool. If a viewer sees it at a 45° angle, where is the image of the coin, relative to the coin? [Hint: The image is found by tracing back to the intersection of two rays.]
1views - Textbook Question
A 1.0-cm-thick layer of water stands on a horizontal slab of glass. A light ray in the air is incident on the water 60° from the normal. What is the ray's direction of travel in the glass?
- Multiple Choice
When a straw is partially submerged in water, why does it appear bent at the water's surface?
- Textbook Question
An underwater diver sees the sun 50° above horizontal. How high is the sun above the horizon to a fisherman in a boat above the diver?
- Textbook Question
(II) A sound wave is traveling in warm air (15°C) when it hits a layer of cold ( - 15° C) denser air. If the sound wave hits the cold air interface at an angle of 28°, what is the angle of refraction? The speed of sound as a function of temperature can be approximated by v = (331 + 0.60 T) m/s , where T is in °C.
1views - Textbook Question
A light beam strikes a piece of glass at a 55.00° incident angle. The beam contains two wavelengths, 450.0 nm and 700.0 nm, for which the index of refraction of the glass is 1.4831 and 1.4754, respectively. What is the angle between the two refracted beams?
1views - Textbook Question
Light of a certain frequency has a wavelength of 526 nm in water. What is the wavelength of this light in benzene?
3views - Multiple ChoiceIf oil is floating on water, what is the critical angle at the oil/water boundary?4views
- Textbook Question
You're visiting the shark tank at the aquarium when you see a 2.5-m-long shark that appears to be swimming straight toward you at 2.0 m/s. What is the shark's actual speed through the water? You can ignore the glass wall of the tank.
2views - Multiple Choice
When a ray of green light passes from air into a slab of ice, what happens to the light as it enters the ice?
- Textbook Question
A costume jewelry pendant made of cubic zirconia is submerged in oil. A light ray in the oil strikes one face of the zirconia crystal at an angle of incidence of 25°. Once inside, what is the ray's angle with respect to the face of the crystal?