Chapter 23: Light: Geometric Optics
- 1.Reflection, refraction, and the formation of images by mirrors and lenses has been successful described by the
- A.
Wave model of light.
- B.
Ray model of light.
- C.
Particle model of light.
- D.
None of the given answers
- 2.The angle of incidence
- A.
Must equal the angle of reflection.
- B.
Is always less than the angle of reflection.
- C.
Is always greater than the angle of reflection.
- D.
May be greater than, less than, or equal to the angle of reflection.
- 3.The principle on which mirrors work is
- A.
Refraction.
- B.
Polarization.
- C.
Dispersion.
- D.
Reflection.
- 4.A plane mirror forms an image that is
- A.
Real and upright.
- B.
Virtual and upright.
- C.
Real and upside down.
- D.
Virtual and upside down.
- 5.Plane mirrors produce images which
- A.
Are always smaller than the actual object.
- B.
Are always larger than the actual object.
- C.
Are always the same size as the actual object.
- D.
Could be smaller, larger, or the same size as the actual object, depending on the placement of the object.
- 6.An image formed when the light rays do not actually pass through the image location, and would not appear on paper or film placed at that location is referred to as a
- A.
Real image.
- B.
Virtual image.
- 7.An image formed when the light rays pass through the image location, and could appear on paper or film placed at the that location is referred to as a
- A.
Real image.
- B.
Virtual image.
- 8.Is it possible to see a virtual image?
- A.
No, since the rays that seem to emanate from a virtual image do not in fact emanate from the image.
- B.
No, since virtual images do not really exist.
- C.
Yes, the rays that appear to emanate from a virtual image can be focused on the retina just like those from an illuminated object.
- D.
Yes, since almost everything we see is virtual because most things do not themselves give off light, but only reflect light coming from some other source.
- E.
Yes, but only indirectly in the sense that if the virtual image is formed on a sheet of photographic film, one could later look at the picture formed.
- 9.A spherical mirror on which reflection takes place on the outer surface of the spherical shape is referred to as a
- A.
Convex mirror.
- B.
Concave mirror.
- 10.A spherical mirror on which reflection takes place on the inner surface of the sphere is referred to as a
- A.
Convex mirror.
- B.
Concave mirror.
- 11.If the radius of curvature of the concave mirror is r, the focal length is
- A.
2r.
- B.
R.
- C.
R/2.
- D.
Cannot be determined from the information given
- 12.A light ray, traveling parallel to a concave mirror's axis, strikes the mirror's surface near its midpoint. After reflection, this ray
- A.
Again travels parallel to the mirror's axis.
- B.
Travels at right angles to the mirror's axis.
- C.
Passes through the mirror's center of curvature.
- D.
Passes through the mirror's focal point.
- 13.Light arriving at a concave mirror on a path parallel to the axis is reflected
- A.
Back parallel to the axis.
- B.
Back on itself.
- C.
Through the focal point.
- D.
Through the center of curvature.
- 14.A light ray, traveling obliquely to a concave mirror's axis, crosses the axis at the mirror's center of curvature before striking the mirror's surface. After reflection, this ray
- A.
Travels parallel to the mirror's axis.
- B.
Travels at right angles to the mirror's axis.
- C.
Passes through the mirror's center of curvature.
- D.
Passes through the mirror's focal point.
- 15.Light arriving at a concave mirror on a path through the center of curvature is reflected
- A.
Back parallel to the axis.
- B.
Back on itself.
- C.
Through the focal point.
- D.
Midway between the focal point and the center of curvature.
- 16.A light ray, traveling obliquely to a concave mirror's surface, crosses the axis at the mirror's focal point before striking the mirror's surface. After reflection, this ray
- A.
Travels parallel to the mirror's axis.
- B.
Travels at right angles to the mirror's axis.
- C.
Passes through the mirror's center of curvature.
- D.
Passes through the mirror's focal point.
- 17.Light arriving at a concave mirror on a path through the focal point is reflected
- A.
Back parallel to the axis.
- B.
Back on itself.
- C.
Through the focal point.
- D.
Through the center of curvature.
- 18.If you stand in front of a concave mirror, exactly at its focal point,
- A.
You won't see your image because there is none.
- B.
You won't see your image because it's focused at a different distance.
- C.
You will see your image, and you will appear smaller.
- D.
You will see your image and you will appear larger.
- E.
You will see your image at your same height.
- 19.An object is placed at a concave mirror's center of curvature. The image produced by the mirror is located
- A.
Out beyond the center of curvature.
- B.
At the center of curvature.
- C.
Between the center of curvature and the focal point.
- D.
At the focal point.
- 20.An object is positioned between a concave mirror's center of curvature and its focal point. The image produced by the mirror is located
- A.
Out past the center of curvature.
- B.
At the center of curvature.
- C.
Between the center of curvature and the focal point.
- D.
At the focal point.
- 21.An object is situated between a concave mirror's surface and its focal point. The image formed in this case is
- A.
Real and inverted.
- B.
Real and erect.
- C.
Virtual and erect.
- D.
Virtual and inverted.
- 22.If you stand in front of a convex mirror, at the same distance from it as its radius of curvature,
- A.
You won't see your image because there is none.
- B.
You won't see your image because it's focused at a different distance.
- C.
You will see your image and you will appear smaller.
- D.
You will see your image and you will appear larger.
- E.
You will see your image at your same height.
- 23.If you stand in front of a convex mirror, at the same distance from it as its focal length,
- A.
You won't see your image because there is none.
- B.
You won't see your image because it's focused at a different distance.
- C.
You will see your image and you will appear smaller.
- D.
You will see your image and you will appear larger.
- E.
You will see your image at your same height.
- 24.Sometimes when you look into a curved mirror you see a magnified image (a great big you) and sometimes you see a diminished image (a little you). If you look at the bottom (convex) side of a shiny spoon, what will you see?
- A.
You won't see an image of yourself because no image will be formed.
- B.
You will see a little you, upside down.
- C.
You will see a little you, right side up.
- D.
You will see a little you, but whether you are right side up or upside down depends on how near you are to the spoon.
- E.
You will either see a little you or a great big you, epending on how near you are to the spoon.
- 25.Concave spherical mirrors produce images which
- A.
Are always smaller than the actual object.
- B.
Are always larger than the actual object.
- C.
Are always the same size as the actual object.
- D.
Could be smaller than, larger than, or the same size as the actual object, depending on the placement of the object.
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