1.What is the refractive index of a medium when light is incident upon it at 45o to the normal and the angle of the refraction is 30o from the normal? A. 1.1 B. 1.2 C. 1.3 D. 1.4 2.Which type of lens would be a good choice to use for the purposes of magnification? A. Diverging lens B. A concave lens C. A converging lens D. Bi concave lens 3.The nature of an image produced by a lens is defined by which attributes? A. The relative size of the image B. Whether the image is upright or inverted relative to the object C. Whether the image is real or virtual D. All of the above 4.What does r represent in the above equation? A. The angle of incidence B. The angle of refraction C. The normal D. The refractive index 5. What does i represent in the above equation? A. The normal B. The angle of refraction C. The angle of incidence D. The refractive index 6.Which formula correctly states how refractive index is related to the angles of incidence and refraction? A. refractive index = sin i⁄sin r B. refractive index = sin r⁄sin i C. refractive index = sin i⁄2 sin r D. refractive index = 2 sin i⁄sin r 7. What is the distance from the lens to the principal focus called? A. Focal width B. Focal height C. Focal length D. Focal point 8. Consider a convex lens – parallel rays of light are brought to a focus at which point? A. Secondary focus B. Primary focus C. Principal focus D. Focal place 9. How does a lens work? A. It forms an image by refracting light B. It forms an image by diffracting light C. It forms an image by diffusing light D. It takes a picture with a digital camera and tags it on Facebook for you to see 10. What is refraction? A. The manipulation of light to form bright and dark spots by passing it through a narrow slit B. The change in direction of light as it passes from one medium to another C. The ability of light to spread out to fill a room D. The ability of light to penetrate solid objects Loading … Question 1 of 10
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