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Conceptual Physics 5.6 Reflection, 5.8 Refraction and 5.9 Mirrors & Lenses Class Set DO NOT WRITE ON THIS COPY Version 1 1. A student stands 4 meters in front of a plane mirror. How far behind the mirror does the image appear? A. I meter B. 2 meters C. 3 meters D. 4 meters 2. Which of these optical instruments converges light (bends light toward the focus)? A. convex lenses and convex mirrors . convex lenses and concave mirrors C. concave lenses and convex mirrors D. concave lenses and concave mirrors 3. Refraction results from differences in lights A. speed B. frequency C. wavelength D. incident angles 4. The diagram below shows a light ray striking a plane mirror. Then angle of reflection of the light ray is 30 60 A. 0 B. 30 C. 60 D. 90 5. Light rays striking a surface are known as A. arriving rays B. departing rays C. reflected rays D. incident rays 6. When light moves from one medium to another what remains constant? A. Angle of refraction B. Speed of light C. Frequency D. Wavelength 7. For reflection, which of the following statements is always true? A. 100% of the energy of the wave is always reflected. B. Incident rays leave the surface after reflecting. C. The angle of incidence = the angle of reflection. D. The reflected ray is bent toward normal. Reflection from a rough surface is known as A. regular reflection B. specular reflection C. irregular reflection D. diffuse reflection Which of the following images can be projected onto a screen? A. A real image B. A virtual image C. Both D. Neither 10. When light reflects from a surface there is a change in its A. frequency B. wavelength C. speed D. none of these 1 1. The critical angle for a transparent material is the angle at and beyond which all light within the material is A. refracted B. reflected C. absorbed D. dispersed 12. The bending of light when it enters a medium with a different optical density is A. reflection B. dispersion C. refraction D. interference 13. When light moves from glass into air A. speed decreases causing the ray of light to bend toward a normal line drawn perpendicular to the surface. B. speed decreases causing the ray of light to bend away from a normal line drawn perpendicular to the surface. C. speed increases causing the ray of light to bend toward a normal line drawn perpendicular to the surface. D. speed increases causing the ray of light to bend away from a normal line drawn perpendicular to the surface