The ordinary light microscope is called a bright-field microscope because

The correct answer will be -The background appears brighter than the specimen which appears darker.

Explanation:

The light microscope uses sunlight energy to view the specimens in the microscope.  

The light microscope is of two types depending on the appearance of the background of the specimens: Bright-field and Dark field specimens. Since in bright-filed microscope, the specimens appear darker than the background which appears darker helps visualize the sample clearly.

Thus, The background appears brighter than the specimen which appears darker is the correct answer.

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answerclassical conditioning;