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- Physics: reflection and refraction 1.What is the law of reflection? Does it apply to rough surfaces as well as smooth? b.Distinguish between regular and irregular reflection. Give an example of each. c. Why is light refracted when it passes from one medium into another? d. Is an image formed by reflection real or virtual? Where is it located6. Regular reflection is the reflection of all light rays at the same from a completely surface 7. Diffused reflection is the spreading out in all of waves reflected at various from an surface. 8. A flat mirror reflects an image from the point of view of someone the glass. or 9. Why are convex mirrors often placed at corners? 10.The image of a concave mirror is focused in of the mirror, not it like a virtual image. E light light to4. Light traveling in glass (n = 3/2) is incident on-air (n=1). What is the angle of incidence that causes the light to experience total internal reflection?
- 1. The of light can change when light is refracted because the medium changes. A. frequency 1 Pt B. color ABc E D C. speed D. transparency 2. Light is not refracted when it is A. traveling from air into a glass of water at an angle of 35° to the normal. B. traveling from water into air at an angle of 35° to the normal. 1 Pt C. striking a wood surface at an angle of 75°. D. traveling from air into a diamond at an angle of 45°. A B E 3. When light passes at an angle to the normal from one material into another material in which its speed is higher, A. it is bent toward the normal to the surface. 1Pt B. it always lies along the normal to the surface. C.itis unaffected. D. it is bent away from the normal to the surface. A B D E1. Define the following: a. refractive index b. critical angle c. total internal reflection 2. Use the defined terms in question no. 1 to explain the sparkle or brilliance of diamond.9. When the sunlight passes through the glass window pane, a beautiful faint rainbow is formed. Which or the following best explains the phenomenon? A. Diffusion B. Dispersion C. Glossy Reflection D. Specular Refraction 10. When a beam of light is passed through a prism, colors are seen. With the given colors of visible light of red, violet, blue, and green, which is the correct arrangement or order of these colors according to increasing energy? C. Violet, blue, green, red A. Green, blue, red, violet B. Blue, red, green, violet D. Red, green, blue, violet 11. Refer to the diagranm below. A man blows a horn in both situations. Which of the two is most likely to happen in the morning? And which is most likely to happen at nighttime? Cool air Warn air Warm air B Cool air
- ______1. Which of the following describes Huygen's Principle? a.A wave can produce an interference pattern. b.The speed of light is constant in every direction. c.The angle of incidence is equal to the angle of reflection. d. Every point on a wavefront acts as a source of lots of secondary spherical wavelets, which can therefore interfere with each other.1. If the visible light wavelength is changed? What else has changed? 2. A light ray traveling through air meets the boundary with glass. What happens to the light wave? What happens to the angle of refraction? 3. Describe what additive and subtractive color light theory is. If an object is a certain color, what light is it reflecting on? What light is it observing?What optic phenomena is NOT the result of the wave nature of light? a.coma. b.spherical aberration. c.photoeffect. d.chromatic aberration. e.thin-film interference.
- a. What is refraction? b. Why does light bend when it passes thru different materials? c. What is reflection?7. What happens when the incident angle is greater than the critical angle? Please describe least two complete sentences. 8. This phenomenon is called Total Internal Reflection (TIR). What do you think would be some practical purposes of TIR in modern technology? Please name at least one example and explain your answer in at least two complete sentences.Light passes from air (n = 1.0003) into a different material. Data, shown above, is collected for different angles of incidence and refraction. What is the new material? A. Diamond (n=2.4) B. Glass (n=1.5) C. Zircon (n=1.9) D. Ice (n=1.3)