PT140.S4.P4.Q21 > Analytics

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Physicists are often asked why the image of an object, such as a chair, appears reversed left-to-right rather than, say, top-to-bottom when viewed in a mirror. ███

Phenomenon / Question · Mirrors only flip images left-to-right. Why not also top-to-bottom?

Field-of-sight Hypothesis / Answer · Something about the axis around which the viewer rotates

No idea what this means. Please god let this not matter.

Front-to-back Hypothesis / Answer · Mirrors actually reverse the image front-to-back

As if there's another object "inside" the mirror

Critique · Of front-to-back hypothesis

Hypothesis is based on a false premise. There's no object inside the mirror.

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Concession · Front-to-back hypothesis has some explanatory power

We usually transform our sense perception into mental constructs of objects. This is why this hypothesis is appealing.

Motivations · Of front-to-back hypothesis

Wants to separate the observer from the phenomenon.

Main Point / Critique · Of front-to-back hypothesis

The real explanation of what mirrors do must consider both the mirror and the observer. So, like the field-of-sight explanation?

Passage Style

Critique or debate

Phenomenon-hypothesis (RC)

21.

According to the passage, the █████████████ ████████ ██ ███████ █████████ ██ ███████ ██

a result of ███ █████████████ ████████ ██ ███████ █████████ ██ ███████

Not supported, because the author criticizes the front-to-back explanation.

a result of ███ ████ ████ ██ ██████████ ██████ ███ █████ ██ █████ █████ █ ████████ ████

Supported.

91%

explained by the ████ ███ ████████ ██ ███ ██████ █████████ ██ ███ ██████

Not supported, because the author never mentions the size of the object affecting the left-to-right reversal.

explained by the ██████████ ███████ ███████████████ ███ █████████████████ ███████

Not supported, because the author doesn’t mention 2-dimensional and 3-dimensional objects in connection with the left-to-right reversal. These concepts are brought up in connection with the front-to-back explanation, but not the left-to-right.

explained by the ██████ ██████████ ██ █████ ███ ███████ ███████ █████████ ██ ███████

Not supported, because the author doesn’t mention mental constructs in connection with the left-to-right reversal. This concept is brought up in connection with the front-to-back explanation, but not the left-to-right.

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PrepTest 140 - Section 4 - Passage 4 - Question 21

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PrepTest 140 - Section 4 - Passage 4 - Question 21

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