1. Rays of light traveling parallel to the principal axis of a concave mirror will come together ____.
a. at the center of curvature.
b. at the focal point.
c. at infinity.
d. at a point half way to the focal point.
2. Which of the following statements is/are true of a virtual image?
1. Virtual images are always located behind the mirror.
2. Virtual images can be either upright or inverted.
3. Virtual images can be magnified in size, reduced in size or the same size as
the object.
4. Virtual images can be formed by concave, convex and plane mirrors.
5. Virtual images are not real; thus you could never see them when sighting in a
mirror.
6. Virtual images result when the reflected light rays diverge.
7. Virtual images can be projected onto a sheet of paper.
3.Punctum Remotum for a child is 4 meters. What is size of eyeglasses that should be
used to make him able to see objects at indefinite distance ?
a. + � D b. � � D c. + 4 D d. � 4 D
4.To observe the situation at the sea surface, an optical instrument is set in a
submarine, that is ��..
a. ocular telescope b. epidiascope c. periscope d.diascope
5.Diagram above shows us the complete ............. "in normal adjustment" (with
final image at infinity).
a. microscope b.telescope
c. lup d. periscope
6.Lens with one flat side and one convex side (bulging outward) is���.
a. convex lens b. positive meniscus c. biconvex lens d.plano
convex lens
7.Point F represents the principal focus. Which of the following diagrams
illustrates the passage of ray of light through a converging lens?
9. A light ray in air is incident on an air to glass boundary at an angle of 45.0 degrees and is refracted in the glass of 30.0 degrees with the normal. What is the index of refraction of the glass?
a. 2.13
b. 1.74
c. 1.23
d. 1.41
10. A beam of light in air is incident at an angle of 35 degrees to the surface of a rectangular block of clear plastic (n = 1.5). The light beam first passes through the block and reemerges from the opposite side into air at what angle to the normal to that surface?
a. 42 degrees
b. 23 degrees
c. 35 degrees
d. 59 degrees
11. A light ray in air enters and passes through a block of glass. What can be stated with regard to its speed after it emerges from the block?
a. speed is less than when in glass
b. speed is less than before it entered glass
c. speed is same as that in glass
d. speed is same as that before it entered glass
12. Which of the following describes what will happen to a light ray incident on an air-to-glass boundary?
a. total reflection
b. total transmission
c. partial reflection, partial transmission
d. partial reflection, total transmission
13. Which of the following describes what will happen to a light ray incident on an air-to-glass boundary at an angle of incidence less than the critical angle?
a. total reflection
b. total transmission
c. partial reflection, partial transmission
d. partial reflection, total transmission
14. Which of the following describes what will happen to a light ray incident on an glass-to-air boundary at an angle of incidence greater than the critical angle?
a. total reflection
b. total transmission
c. partial reflection, partial transmission
d. partial reflection, total transmission
15. What is the angle of incidence on an air-to-glass boundary if the angle of refraction in the glass (n = 1.52) is 25 degrees?
a. 16 degrees
b. 25 degrees
c. 40 degrees
d. 43 degrees
16. A ray of white light, incident upon a glass prism, is dispersed into its various color components. Which one of the following colors experiences the greatest amount of refraction?
a. orange
b. violet
c. red
d. green
17. When light from air hits a smooth piece of glass (n = 1.5) with the ray perpendicular to the glass surface, which of the following will occur?
a. reflection and transmission at an angle of 0 degrees
b. dispersion
c. refraction at an angle of 41.8 degrees
d. all of the above will occur
18. If total internal reflection occurs at a glass-air surface, then _____.
1. no light is refracted
2. no light is reflected
3. light is leaving the air and hitting the glass with an incident angle greater than the critical angle
4. light is leaving the air and hitting the glass with an incident angle less than the critical angle
19. When light from air hits a smooth piece of glass with the ray perpendicular to the glass surface, the part of the light passing into the glass _____.
a. will not change its speed
b. will not change its direction
c. will not change its wavelength
d. will not change its intensity
20. This problem could most easily be corrected by the use of a(n) ____.
a. converging lens
b. diverging lens
c. achromatic lens
d. good night's sleep
21. A standing wave experiment is performed to determine the speed of waves in a rope. The standing wave pattern shown below is established in the rope. The rope makes 90.0 complete vibrational cycles in exactly one minute. The speed of the waves is ____ m/s.
a. 3.0 b. 6.0
c. 180 d. 360
22. Consider the standing wave pattern shown below. A wave generated at the left end of the medium undergoes reflection at the fixed end on the right side of the medium. The number of antinodes in the diagram is
a. 3.0 b. 5.0
c. 6.0 d. 7.0
23. A transverse wave is traveling through a medium. See diagram below. The particles of the medium are moving.
a. parallel to the line joining AD.
b. along the line joining CI.
c. perpendicular to the line joining AD.
d. at various angles to the line CI.
24. If the energy in a longitudinal wave travels from south to north, the particles of the medium ____.
a. move from north to south, only.
b. vibrate both north and south.
c. move from east to west, only.
d. vibrate both east and west.
25. A 3.0 cm tall object is placed along the principal axis of a thin converging lens of 30.0 cm focal length. If the object distance is 40.0 cm, which of the following best describes the image distance and height, respectively?
a. 17.3 cm and 7.0 cm
b. 120. cm and -9.0 cm
c. 17.3 cm and 1.3 cm
d. 120. cm and -1.0 cm
0 komentar:
Posting Komentar