Ray Optics and Optical Instruments — Practice Quiz
Telangana Open School (TOSS) · Class 12 · Physics
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What is the least distance of distinct vision for a normal human eye?
Which of the following is a simple microscope?
What is the nature of the image formed by a simple microscope?
What is the primary function of the objective lens in a compound microscope?
Sample Questions
Which part of the human eye determines the near point?
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Ciliary muscles
The ciliary muscles adjust the focal length of the eye lens, allowing the eye to focus on nearby objects. The near point depends on their ability to contract.
What is angular magnification?
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The ratio of the angle subtended by the image at the eye to the angle subtended by the object
Angular magnification, also called magnifying power, compares how large an object appears through an instrument versus with the naked eye.
In normal adjustment of a simple microscope, where is the image formed?
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At infinity
In normal adjustment, the image is formed at infinity so that the eye is least strained while viewing.
Which of the following is NOT a use of a simple microscope?
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Viewing distant stars
A simple microscope is used to magnify small nearby objects. Distant objects like stars require telescopes.
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