ProfLeopardPerson1411
Passage A Hanging clear, water-filled bags from doorways is an…
Passage A
Hanging clear, water-filled bags from doorways is an increasingly popular,
and rather unlikely, new method for deflecting annoying-and potentially
disease-carrying-flies from building entrances.
Some advocates claim that the flies recognize the liquid as the surface of a
body of water while others-ludicrously-insist the insect flies away
because it is frightened by its own magnified reflection. The most credible
explanation, however, concerns the refraction of light.
Light rays travel in a straight line. Refraction is what happens when
something like a clear object such as a piece of glass or a bag of water-
gets in the way. Hitting the object changes the ray’s velocity and direction,
bending, or refracting, it. Refracted rays of light can cause optical illusions,
including such things as mirages that even confuse human eyes.
A fly’s head consists primarily of a pair of large complex eyes, each
composed of 3,000 to 6,000 simple eyes. This physiology allows the fly
to see idmultiple directions at once. Even though these eyes cannot move
or focus on objects like human eyes, they grant the fly a mosaic view of its
surroundings, and each simple eye provides one small piece of the puzzle.
A housefly bases its sense of direction on the direction sunlight comes
from, so when these complex, sensitive eyes experience refracted light,
the fly becomes confused and flies away.
Although this explanation is persuasive and plausible, research conducted
to replicate the results on fly-plagued poultry farms has been inconclusive.
Passage B
While the water-bag method of fly repellent has many supporters, it has at
least as many detractors. Advocates claim that refracted light in water
baffles the flies’ compound eyes. This theory seems quite plausible, but
critics classify it as a kind of coincidence masquerading as cause and
anging water hans may seem to work due to the placebo effect. In medicine this is a treatment without therapeutic value, which is administered as if it were a therapy. The “medicine” makes people feel better due to its curative values. The same effect is likely to occur when people think they are treating a pest problem, and thus notice that the problem seems to diminish.
But what if the placebo even increase the problem? Recently, scientists conducted an experiment over the course of thirteen weeks on two egg farms to measure fly activity and encountered just such a situation. They installed commercial, water-based optical fly repellents and concluded that areas equipped with water bags actually attracted more of theses irritating creatures.
Since there are reasonable explanations that support the water-bag method and significant evidences that argues against it, it’s up to you whether uou keep hanging up water-filled bags around your home or not.
The passage mentions experiments conducted in an agricultural environment
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The passage makes a convincing case for the effectiveness of the water-bag method.
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The passage states that there are more people who do not believe in the water-bag theory than there are supporters of the
theory.
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The passage suggests that people hang water bags and then notice fewer pests.
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The autor supports the theory that flies are scared of their own reflections.
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The passage mentions the claim that water bags make flies look bigger
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The passage mentions the fact that flies have compound eyes
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The passage states that use of water bags is connected to higher levels of fly activity
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