Using the scale factor, the distance that the screen should be from the light is: 12 inches.
Scale Factor of Dilation
Scale factor (k) = dimension of new image / corresponding dimension of original image.
- Length of puppet = 25 in. (original image).
- Length of Image = 30 in. (new image)
Scale factor (k) = 30/25 = 1.2.
let x be the length of the distance from the light to the puppet.
Therefore:
1.2 = (x + 2)/x
1.2x = x + 2
1.2x - x = 2
0.2x = 2
x = 2/0.2
x = 10.
Thus:
Distance from the screen to the light = x + 2 = 10 + 2 = 12 inches.
Therefore, using the scale factor, the distance that the screen should be from the light is: 12 inches.
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