A Microbiology Student with a Visual Disability Is Viewing a Sample

question 5

Multiple Choice

A microbiology student with a visual disability is viewing a sample of Bacillus endospores in a phase contrast microscope that is linked to an iPad.By "stretching" the image on the iPad screen, the student can increase the apparent size of the endospores.How does this manipulation affect resolution and contrast? (No software is being used to alter the image!)

• A)Only the magnification can be increased; resolution and contrast are unchanged.
• B)Contrast will improve because the microscope is phase-contrast.
• C)Both magnification and resolution increase; contrast is unchanged.
• D)Resolution and magnification will decrease because the screen is not as good as the human eye.

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