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    1: <problem>
    2:   <include>
    3:     <parserlib> multiple_true </parserlib>
    4:   </include>
    5:   <part required="true">
    6:     <answergroup>
    7:       <outtext>
    8: 	Identify as true or false the following statements concerning
    9: 	images formed by a SINGLE OPTICAL ELEMENT.  The element may be a
   10: 	plane mirror, a concave mirror, a convex mirror, a converging
   11: 	lens, or a diverging lens.
   12: 	<tex> \newline </tex>
   13:       </outtext>
   14:       <block condition="&hinton()">
   15: 	<outtext>
   16: 	  Recall that real images are on the opposite side of a single
   17: 	  lens from the object. Real images for a mirror are on the
   18: 	  same side as the object.
   19: 	</outtext>
   20:       </block>
   21:       <multipletrue option="atleastonetrue">
   22: 	<multipletrueconcept description="Real Image Size">
   23: 	  <multipletrueresponse value=false>
   24: 	    <foil>
   25: 	      <check style="check"> 
   26: 		Real images are always smaller than objects. <br>
   27: 	      </check>
   28: 	    </foil>
   29: 	  </multipletrueresponse>
   30: 	  <multipletrueresponse value=false>
   31: 	    <foil>
   32: 	      <check style="check"> 
   33: 		Real images are always larger than objects. <br>
   34: 	      </check>
   35: 	    </foil>
   36: 	  </multipletrueresponse>
   37: 	</multipletrueconcept>
   38: 	<multipletrueconcept description="Virtual Image Direction">
   39: 	  <multipletrueresponse value=true>
   40: 	    <foil>
   41: 	      <check style="check"> 
   42: 		Virtual images are always  upright (i.e., of the same vertical
   43: 		orientation as the objects).
   44: 	      </check>
   45: 	    </foil>
   46: 	  </multipletrueresponse>
   47: 	  <multipletrueresponse value=false>
   48: 	    <foil>
   49: 	      <check style="check"> 
   50: 		Virtual images can be inverted (i.e., of the opposite vertical
   51: 		orientation as the object which formed it).
   52: 	      </check>
   53: 	    </foil>
   54: 	  </multipletrueresponse>
   55: 	</multipletrueconcept>
   56: 	<multipletrueconcept description="Real Image Direction">
   57: 	  <multipletrueresponse value=true>
   58: 	    <foil>
   59: 	      <check style="check"> 
   60: 		Real images are always inverted (i.e., of the opposite
   61: 		vertical orientation as the object).
   62: 	      </check>
   63: 	    </foil>
   64: 	</multipletrueresponse>
   65: 	  <multipletrueresponse value=false>
   66: 	    <foil>
   67: 	      <check style="check"> 
   68: 		Real images can be upright (i.e., of the same vertical
   69: 		orientation as the object).
   70: 	      </check>
   71: 	    </foil>
   72: 	  </multipletrueresponse>
   73: 	</multipletrueconcept>
   74: 	<multipletrueconcept description="Where an object is relative 
   75: 	  to its image">
   76: 	  <multipletrueresponse value=true>
   77: 	    <foil>
   78: 	      <check style="check"> 
   79: 		The real image by a mirror is always on the same side as
   80: 		the object. 
   81: 	      </check>
   82: 	    </foil>
   83: 	  </multipletrueresponse>
   84: 	  <multipletrueresponse value=false>
   85: 	    <foil>
   86: 	      <check style="check"> 
   87: 		A mirror creates a virtual image on the same side as the
   88: 		object.
   89: 	      </check>
   90: 	    </foil>
   91: 	  </multipletrueresponse>
   92: 	  <multipletrueresponse value=false>
   93: 	    <foil>
   94: 	      <check style="check"> 
   95: 		A mirror creates a real image on the side opposite the
   96: 		object.
   97: 	      </check>
   98: 	    </foil>
   99: 	  </multipletrueresponse>
  100: 	  <multipletrueresponse value=true>
  101: 	    <foil>
  102: 	      <check style="check"> 
  103: 		The virtual image by a mirror is always on the side
  104: 		opposite the object. 
  105: 	      </check>
  106: 	    </foil>
  107: 	  </multipletrueresponse>
  108: 	</multipletrueconcept>
  109: 	<showrandomfoil/>
  110: 	<showrandomfoil/>
  111: 	<showrandomfoil/>
  112: 	<showrandomfoil/>
  113:       </multipletrue>
  114:     </answergroup>
  115:   </part>
  116: </problem>