GEO 221 Study Guide - Midterm Guide: Geocoding, Human Geography, Aerial Photography

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jadegiraffe362

28 Oct 2012

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What is gis : geographical information systems. Why use gis: to create and analyze maps, photographs, satellite images. Why analyze them: to see information (data) on a visual form to identify relationships, trends. Gis can be used for: choosing the most effective way to build/take down buildings, protecting forestry, buffer: customer spotting (taking postal codes) Distance decay: the further away the data from a location the less amount of data. It is a function that represents the way that some entity or its influence decays with a distance from its geographical location. Ecological fallacy: a problem associated with the modifiable areal unit problem that occurs when it is inferred that data for areas under study can be applied to individuals in these areas. The assumption that an individual from a specific group or area will exhibit a trait that has predominant to the group as a whole.

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2) (10 pts) In the accompanying photo, the images of Sir John A. MacDonald's nose and the Library of Parliament are each twice the size that they appear on the ten-dollar bill, and are at a distance of 3.0 cm from the lens of the magnifying glass. a. Determine the focal length of the lens of the magnifying glass. b. Draw a ray diagram for the system. It does not need to be exactly to scale, but should show the essential features of the system. (Hint: the photo gives you information about the (virtual) image that your eye and the camera see-use this, together with the information given above, to solve the problem). ADA

With this information I obtained: distance from laser to thewall was 126cm; when the light hit the wall we recorded 7dots x wasthe center and 2x2 was the distance of the dots on both sides ofthe center etc. (slit A width = .04mm with distance of the lightbeams on the wall respectively x=0mm 2x2=50mm 2x3=100mm 2x4=150mm)(slit B width =.04mm distance of the light beams on the wall x=0mm2x2=30mm 2x3=50mm 2x4=80mm) (slit c width=.08mm x=0mm 2x2=50mm2x3=100mm 2x4=150mm) (slit D width=.08mm x=0cm 2x2=40mm 2x3=50mm2x4=60mm)

1. Draw the interference pattern, labeling each of the maxima withtheir order number (calculation 1) and the angle (calculation 2)for each set of data.
2. Plot d*sin( ?), where d is the distance between the slits,versus the order number (calculations 1 and 2 below). Put the datafrom all your measurements on this graph.

Questions and Calculations
1. For each set of data, assign each bright spot an "order" bylabeling the central bright spot "zero" and counting outward inboth directions. Use only positive numbers.
2. Use your data for the location of each bright spot and thedistance from the slits to the wall to compute the angle betweenthe central maximum and other maxima, q. Compute sin(q) also.
3. From graph 2, find the wavelength of the laser light.

With this information I obtained: distance from laser to thewall was 126cm; when the light hit the wall we recorded 7dots x wasthe center and 2x2 was the distance of the first set,2x3 the secondetc. of dots outside of the center etc. (slit A width = .04mmspacing = .25mm with distance of the light beams on the wallrespectively x=0mm 2x2=50mm 2x3=100mm 2x4=150mm) (slit B width=.04mm spacing=.50mm distance of the light beams on the wall x=0mm2x2=30mm 2x3=50mm 2x4=80mm) (slit c width=.08mm spacing=.25mm x=0mm2x2=50mm 2x3=100mm 2x4=150mm) (slit D width=.08mm spacing=.50mmx=0cm 2x2=40mm 2x3=50mm 2x4=60mm)

1. Draw the interference pattern, labeling each of the maxima withtheir order number (calculation 1) and the angle (calculation 2)for each set of data.
2. Plot d*sin( ?), where d is the distance between the slits,versus the order number (calculations 1 and 2 below). Put the datafrom all your measurements on this graph.

Questions and Calculations
1. For each set of data, assign each bright spot an "order" bylabeling the central bright spot "zero" and counting outward inboth directions. Use only positive numbers.
2. Use your data for the location of each bright spot and thedistance from the slits to the wall to compute the angle betweenthe central maximum and other maxima, q. Compute sin(q) also.
3. From graph 2, find the wavelength of the laser light

GEO 221 Study Guide - Midterm Guide: Geocoding, Human Geography, Aerial Photography

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