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What I Know Directions: Read carefully each item. Choose the letter that you think best answers the question. Write the answer in your notebook or sheet of paper. reflection of light on a(n) 1. Regular reflection is the surface. C. semi-smooth, rough A. even, smooth D. uneven, rough B. even or uneven, rough direction(s) of 2. The image you see on a plane mirror is placed in real image. C. the opposite A. five B. multiple directions D. the same 3. A plane mirror has a/an reflecting surface. A. angled B. concave C. convex D. flat 4. Diffuse Reflection is a(n) surface. A. even, smooth C. semi-smooth, rough B. even or uneven, semi rough D. uneven, rough 5. Scattering of light occurs when light waves travelling in direction(s) is/are made to travel in direction(s). A. one, many B. one, ten C. many, one D. several, one 6. With Regular/Diffuse Reflection, the of the object will determine the SHARPNESS of reflection. A. angle B. color C. surface D. a and b 7. As per the Law of Reflection measured through the normal line, the angle of incidence is_ to the angle of reflection. A. equal C. less than B. greater than D. both a and b 8. A concave mirror may form an image which is . Which one of the following is incorrect? A. real, erect and magnified C. real, inverted and magnified B. real, inverted and diminished D. real, inverted and same size 9. The image in a convex mirror is always A. real, erect and diminished B. real, erect and magnified C. virtual, erect and diminished D. virtual, inverted and diminished 210. The image formed in a plane mirror is_ A. at the same distance in front of the mirror as the object is in front of the mirror. B. at a shorter distance in front of the mirror than the distance that the object is in front of the mirror. C. at the same distance behind the mirror as the object is in front of the mirror. D. at a shorter distance behind the mirror than the distance the object is in front of the mirror. 11. A typical mirror you look in at a home or in a restroom is a mirror. A. concave B. convex C. parabolic D. plane 12. What type of lens produces smaller and upright images? A. concave lens C. convex lens B. converging lens D. cannot be determined 13. What type of lens is thicker at the center as compared to its edges? A. concave B. convex C. parabolic D. plane 14. The size of the image is always smaller than the object in A. concave mirror B. convex mirror C. plane mirror D. silver mirror 15, What type of lens is use to correct nearsightedness? A. concave B. convex C. parabolic D. plane11. The focal length is denoted by the letter d. p a. f b. F C. P 12. A spherical mirror with reflecting surface curved inwards is called a. concave mirror c. curved mirror b. convex mirror d. none of the above 13. The distance from the focal point to the vertex is called a. center of curvature c. focal point b. focal length d. vertex 14. Which lens is used to magnify objects and refract light? This type of lens is curved outward. a. concave lens b. convex lens c. parabolic lens d. plane lens 15. Which describes a concave lens? a. more transparent in the middle b. thinner in the middle than on the edges c. thinner on the edges than in the middle d. triangular in shape.Assessment Posttest Directions: Read carefully each item. Choose the letter that you think best answers the question. Write the answer in your notebook or sheet of paper. 1. The reflection by the rough surfaces that tend to reflect light in all directions is called_ a. diffused reflection c. regular reflection b. glossy reflection d. specular reflection 2. The image you see in a plane mirror is called a not a real, physical object. image because it is a. imaginary b. physical c. reflected d. virtual 3. The image seen in a plane mirror is a. real and inverted c. virtual and inverted b. real and upright d. virtual and upright 4. Diffuse Reflection is produced by surfaces that tend to reflect light in all directions. a. rough b. semi rough c. semi smooth d. smooth 5. Which of the following is a diverging lens? a. concave lens b. convex lens c. parabolic lens d. plane lens 6. The center of curvature is denoted by letter a. C b. C C. O d. 0 7. If the angle of incidence between the incident ray and the normal line is 25 degrees, what is the angle of reflection? a. 65 degrees b. 45 degrees c. 35 degrees d. 25 degrees 8. The image formed by a concave mirror will a. always be real c. be either real or virtual b. always be virtual d. will always be magnified 9. The image formed by a convex mirror will a, always be real c. be either real or virtual b, always be virtual d. will always be magnified 10. The focal length is one-half the distance from the vertex to the c. radius of curvature a. center of curvature d. none of the above b. principal axis