refection of light rays on a C. semi smooth, rough D. uneven, rough 27. Diftuse Reflection is aln). A even, smooth B. even or uneven, semi rough 28. Scattering of light occurs when light waves traveling surface. direction(s). B. one, ten drection(s) is/are made to travel in A one, many 29. With Regular/Difuse Reflection, the A angle C. many, one of the object will determine the SHARPNESS of reflection C. surface D. several, one B. color he angle of indidence between the incident ray and the normal line is 35 degrees, what is the angle of refectien? A. 65 degrees 31. When the image is seen in the concave mirror, the image will A. always be real B. always be virtual 32 When the image is seen in the convex mirror, the image will A always be real B. always be virtual 33. The focal length is equal to the half of the. A. center of curvature 34. The focal length is denoted by the letter. 35. A spherical mirror with reflecting surface curved inwards is called A. concave miror 36. The distance from the focal point to the vertex is called A. center of curvature B. focal length 37. Which lens is used to magnify objects and refract light? This type of lens is curved outward. D.a and b B. 45 degrees C. 35 degrees D. 25 degrees C. be elther real or virtual D. wil always be magrnified C. be either real or virtual D. will always be magnified B. principal axis C. radius of curvature A.f D. none of the above B.F C.P D.p B. convex miror C. curved mirror D. none of the above C. focal point D. vertex B. convex lens C. parabolic lens A. concave lens 38. Which of the following statements is TRUE about virtual image? A. virtual image seems to appear behind the mirror and is upside down. B. virtual image seems to appear behind the mirror and is seen in an upright position. C. virtual image is formed after the light rays are reflected from the mirror. D. All of the above. 39. The sun's rays are observed to focus at a point behind a lens. What kind of lens was used? A. converging lens B. diverging lens 40. Looking through a concave lens, arm-length away can make object appear. A. smaller and upright B. smaller and upside down C. larger and upright 41. Images in a kaleidoscope are examples of A. multiple image B. convex mirror 42. To correct nearsightedness, a person is prescribed with what kind of lenses? A. Converging lens 43. What type of image is formed by the concave side of the spoon when the object is arm-length away from it? A. Upright and bigger B. Upside down and bigger 44. Convex lenses are used in A. magnifying smaller objects 45. What do you call an energy converting system that transforms electrical energy into mechanical movement? A. Electric motor 46. Which of these is the commutator function in the generator? A. Acts as a rectifier that converts AC voltage to DC voltage within the winding of the armature. B. Diminish the energy loss caused by Eddy Current. C. Offer magnetic fields where the coil is rotating. D. Provides electricity to the generator. 47. What do you name a mechanism that generates electrical current when a wire coil is wrapped around an iron core and rotated dose to a magnet? A. car 48. Which is NOT a distinctive attribute of an electrical generator? A. Electric generator turns mechanical energy into electric energy. B. Electric generator turns electric power into mechanical energy C. It provides electricity. D. It is based upon the electromagnetic induction theory. 49. What do you name a huge wheel (assocdated with generators) that rotates when driven by water, wind, or steam? A. Motor D. plane lens C. focusing lens D. none of the above D. larger and upside down C. concave mirror D. lateral inversion B. Diverging lens C. Focusing lens D. None of the above. C. Upright and smaller D. Upside down and smaller B. camera C. microscopes D. all of the above B. Electric field C. Electric generator D. Electric plasma C. motor D. generator B. magnet C Turbine D. Magnet B. Pipe