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Ray Optics and Optical Instruments Quiz
Class XII
Physics
Ray Optics and Optical Instruments
14 questions
HARD
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Preview questions
1. What is the focal length of a concave mirror if an object is placed at a distance of 30 cm and the image is formed at 15 cm?
10 cm · 15 cm · 20 cm · 30 cm
2. Which lens type is used to correct hypermetropia?
Concave lens · Convex lens · Bifocal lens · Cylindrical lens
3. What is the nature of the image formed by a convex lens when the object is placed at a distance greater than twice the focal length?
Real and inverted · Virtual and erect · Real and erect · Virtual and inverted
4. In a simple microscope, what is the maximum angular magnification achievable?
Less than 5 · 5 to 10 · 10 to 20 · Greater than 20
5. What is the principal focus of a concave lens?
Real focus · Virtual focus · At infinity · None of the above
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