# Physics 203 at Portland State 2014

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exam_2_review [2014/05/14 05:10]
nugentm [Review question 4]
exam_2_review [2014/05/14 14:48] (current)
wikimanager [Review problem 3] added solution
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You have a choice between two lenses of focal lengths $f_a$ and $f_b = 2 f_a$ to use as objective lens in building a compound microscope. If the magnification you obtain using lens //a// is $M_a$, what will be the magnification when using lens //​b//? ​ You have a choice between two lenses of focal lengths $f_a$ and $f_b = 2 f_a$ to use as objective lens in building a compound microscope. If the magnification you obtain using lens //a// is $M_a$, what will be the magnification when using lens //​b//? ​
* [....] A) $M_b = \frac{1}{4} M_a$   * [....] A) $M_b = \frac{1}{4} M_a$
-  * [....] B) $M_b = \frac{1}{2} M_a$+  * [ <color green>​X</​color> ​] B) $M_b = \frac{1}{2} M_a$
* [....] C) $M_b = 8 M_a$   * [....] C) $M_b = 8 M_a$
* [....] D) $M_b = 4 M_a$    * [....] D) $M_b = 4 M_a$
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Which of the following expressions is correct for the transmitted intensity of an unpolarized beam of light with an intensity $I_i$ passing through a polarizer? ​ Which of the following expressions is correct for the transmitted intensity of an unpolarized beam of light with an intensity $I_i$ passing through a polarizer? ​
* [....] A) $I_t = 2 I_i$   * [....] A) $I_t = 2 I_i$
-  * [....] B) $I_t = \frac{1}{2} I_i$+  * [ <color green>​X</​color> ​] B) $I_t = \frac{1}{2} I_i$
* [....] C) $I_t = I_i$   * [....] C) $I_t = I_i$
* [....] D) $I_t = 4 I_i$   * [....] D) $I_t = 4 I_i$
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* [....] A) neither spherical nor chromatic aberration. ​   * [....] A) neither spherical nor chromatic aberration. ​
* [....] B) chromatic aberration, but not spherical aberration. ​   * [....] B) chromatic aberration, but not spherical aberration. ​
-  * [....] C) spherical aberration, but not chromatic aberration.+  * [ <color green>​X</​color> ​] C) spherical aberration, but not chromatic aberration.
* [....] D) both spherical and chromatic aberration. ​   * [....] D) both spherical and chromatic aberration. ​

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* [....] B) $4.8$ m    * [....] B) $4.8$ m
* [....] C) $4.2$ m    * [....] C) $4.2$ m
-  * [....] D) $-4.2$ m +  * [ <color green>​X</​color> ​] D) $-4.2$ m
* [....] E) $5.2$ m    * [....] E) $5.2$ m

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* [....] B) $-36.4$ cm   * [....] B) $-36.4$ cm
* [....] C) $-21.2$ cm   * [....] C) $-21.2$ cm
-  * [....] D) $+36.4$ cm+  * [ <color green>​X</​color> ​] D) $+36.4$ cm
* [....] E) $+21.2$ cm   * [....] E) $+21.2$ cm

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====Review question 10==== ====Review question 10====
An object is placed in front of a convex mirror at a distance larger than twice the focal length of the mirror. The image will appear ​ An object is placed in front of a convex mirror at a distance larger than twice the focal length of the mirror. The image will appear ​
* [....] A) upright and enlarged.  ​   * [....] A) upright and enlarged.  ​
-  * [....] B) upright and reduced.+  * [ <color green>​X</​color> ​] B) upright and reduced.
* [....] C) inverted and enlarged.   * [....] C) inverted and enlarged.
* [....] D) inverted and reduced.  ​   * [....] D) inverted and reduced.  ​
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* [....] A) 2.0    * [....] A) 2.0
* [....] B) 1.5    * [....] B) 1.5
-  * [....] C) 1.0 +  * [ <color green>​X</​color> ​] C) 1.0
* [....] D) 0.25   * [....] D) 0.25
* [....] E) 0.5    * [....] E) 0.5
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====Review question 12==== ====Review question 12====
A vertically polarized beam of light of intensity $100\frac{\text W}{\,{\text m}^2}$ passes through a polarizer with its transmission axis at 40.0$^\circ$ to the vertical. What is the transmitted intensity of this beam of light? ​ A vertically polarized beam of light of intensity $100\frac{\text W}{\,{\text m}^2}$ passes through a polarizer with its transmission axis at 40.0$^\circ$ to the vertical. What is the transmitted intensity of this beam of light? ​
-  * [....] A) $58.7\frac{\text W}{\,{\text m}^2}$ ​+  * [ <color green>​X</​color> ​] A) $58.7\frac{\text W}{\,{\text m}^2}$ ​
* [....] B) $0\frac{\text W}{\,{\text m}^2}$ ​   * [....] B) $0\frac{\text W}{\,{\text m}^2}$ ​
* [....] C) $100\frac{\text W}{\,{\text m}^2}$ ​   * [....] C) $100\frac{\text W}{\,{\text m}^2}$ ​
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* [....] A) 200 cm    * [....] A) 200 cm
* [....] B) 101 cm    * [....] B) 101 cm
-  * [....] C) 198 cm +  * [ <color green>​X</​color> ​] C) 198 cm
* [....] D) 202 cm    * [....] D) 202 cm
* [....] E) 2.0 cm   * [....] E) 2.0 cm
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* [....] C) half as large as his face    * [....] C) half as large as his face
* [....] D) four times as large as his face    * [....] D) four times as large as his face
-  * [....] E) three times as large as his face+  * [ <color green>​X</​color> ​] E) three times as large as his face

<color green></​color>​ <color green></​color>​
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* [....] B) a short focal length objective and a long focal length eyepiece.   * [....] B) a short focal length objective and a long focal length eyepiece.
* [....] C) a short focal length objective and a short focal length eyepiece. ​   * [....] C) a short focal length objective and a short focal length eyepiece. ​
-  * [....] D) a long focal length objective and a short focal length eyepiece.+  * [ <color green>​X</​color> ​] D) a long focal length objective and a short focal length eyepiece.

<color green></​color> ​ <color green></​color> ​
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- A lens with a negative focal length.   - A lens with a negative focal length.
-    * <color green>...</​color> ​+    * <color green>diverging lens</​color> ​
- A problem in lenses where different colors of light are focused to different focal points. ​   - A problem in lenses where different colors of light are focused to different focal points. ​
-    * <color green>...</​color> ​+    * <color green>chromatic aberration</​color> ​
- The angle of incidence of light such that after striking a surface the reflected light is completely polarized.   - The angle of incidence of light such that after striking a surface the reflected light is completely polarized.
-    * <color green>...</​color> ​+    * <color green>Brewster'​s angle</​color> ​
- Reflection from a rough surface such that light is sent out in a variety of directions.   - Reflection from a rough surface such that light is sent out in a variety of directions.
-    * <color green>...</​color> ​+    * <color green>diffuse reflection</​color> ​
- Light rays converge towards this type of object. The sign convention for the distance to the object in this case is negative.   - Light rays converge towards this type of object. The sign convention for the distance to the object in this case is negative.
-    * <color green>...</​color> ​+    * <color green>virtual object</​color> ​
- The ability of a lens to refract light (commonly measured in diopters)   - The ability of a lens to refract light (commonly measured in diopters)
-    * <color green>...</​color> ​+    * <color green>refractive power</​color> ​
- A problem in lenses and mirrors of a particular shape where light further away from the principal axis is focused to a different point than light closer to the principal axis.   - A problem in lenses and mirrors of a particular shape where light further away from the principal axis is focused to a different point than light closer to the principal axis.
-    * <color green>...</​color> ​+    * <color green>spherical aberration</​color> ​
- The length of this device is the sum of the two focal lengths of the lenses used to make it   - The length of this device is the sum of the two focal lengths of the lenses used to make it
-    * <color green>...</​color> ​+    * <color green>telescope</​color> ​
- A property of a material that is related to how fast light travels in the material   - A property of a material that is related to how fast light travels in the material
-    * <color green>...</​color> ​+    * <color green>index of refraction</​color> ​
- Colorful object seen in the sky due to the dispersion of light in raindrops.   - Colorful object seen in the sky due to the dispersion of light in raindrops.
-    * <color green>...</​color> ​+    * <color green>rainbow</​color> ​

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exam_2_review.txt ยท Last modified: 2014/05/14 14:48 by wikimanager