Read the following passage about the human eye and answer the question. In what way is the human eye similar to a television camera, according to the passage?

Difficulty: Easy

Correct Answer: Both convert light energy to electrical energy.

Explanation:


Introduction / Context:
The passage compares the human eye with a television camera to explain how vision works. It explains that both devices transform light energy into another form of energy that can be processed further. The question asks precisely what kind of transformation both the eye and the television camera perform according to the text.


Given Data / Assumptions:

  • The passage clearly states that the eye is similar to a television camera.
  • Both the eye and the television camera convert light energy to electrical energy.
  • The eye converts light into nerve impulses that are interpreted by the brain as sight.
  • A television camera converts light into electronic signals that are broadcast and converted back into light images in a television receiver.
  • No mention is made of mechanical energy in relation to the eye or the camera.


Concept / Approach:
This is a comprehension question that tests the understanding of an analogy. The eye is compared to a television camera to show that both work as converters of one form of energy into another. The approach is to read the part of the passage that begins with “The eye is similar to a television camera” and to extract the key phrase that describes their common function.


Step-by-Step Solution:

Step 1: Locate the sentence where the passage explicitly compares the eye with a television camera. Step 2: Read that sentence carefully. It says that both convert light energy to electrical energy. Step 3: Note that in the eye, electrical like nerve impulses are generated, while in the camera, electronic signals are produced. Step 4: Compare this information with the answer choices. Step 5: Choose option b, which directly repeats “convert light energy to electrical energy.”


Verification / Alternative check:
From basic physics, we know that sight involves conversion of light stimuli into electrical signals in the nervous system. Television technology also uses photoelectric conversion to change light into electronic signals. Therefore, both science and the literal passage support option b. The other options add mechanical elements not mentioned in the text and not relevant to the eye or the television camera in this context.


Why Other Options Are Wrong:

  • Option a: Conversion to mechanical energy is not discussed at all, and it does not describe the main function of either device.
  • Option c: The expression “mechanical light” is not meaningful in this context and is not used in the passage.
  • Option d: The passage never says that either device converts mechanical light to electrical energy; the starting point is always light energy itself.


Common Pitfalls:
Test takers may get distracted by unfamiliar phrases or may guess based on partial memories of physics. Some may think of mechanical analogies for focusing or movement of the eye. The correct strategy is to rely on the explicit wording in the passage and choose the option that exactly matches it without adding extra concepts.


Final Answer:
Both convert light energy to electrical energy. is the correct answer because the passage clearly states that this is the common feature linking the human eye and a television camera.

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