Lenses — Practice Quiz
Maharashtra Board · Class 10 · Science
Try a 4-question quiz on Lenses for Maharashtra Board Class 10 Science: tap an answer to check it and see why. 44 questions in the full chapter test.
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Quick Quiz: Lenses
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Which type of lens is thicker at the center than at the edges?
What is the point inside a lens through which light rays pass without changing direction?
The distance between the optical center and principal focus of a lens is called:
Which lens defect causes difficulty in seeing nearby objects clearly?
Sample Questions
Which of the following are characteristics of a concave lens? (Select all correct answers)
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Diverging lens, Thinner at center, Virtual focus
A concave lens is a diverging lens that is thinner at the center. It has a virtual focus and always forms virtual, erect, and diminished images.
What type of image is formed by a concave lens?
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Virtual and erect
A concave lens always forms virtual, erect, and diminished images regardless of the object position.
Which of the following are rules for ray diagrams in convex lenses? (Select all correct answers)
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Ray parallel to axis passes through focus, Ray through focus becomes parallel to axis, Ray through optical center continues straight
These are the three fundamental rules for drawing ray diagrams for convex lenses to determine image position and properties.
The unit of power of a lens is:
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Dioptre
The unit of power of a lens is Dioptre (D). Power is the reciprocal of focal length in meters: P = 1/f.
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