Lens Formula and MagnificationPractice Questions & MCQs
Practice Lens Formula and Magnification questions from Light - Reflection and Refraction (Class 10 Science) - important MCQs with answers and step-by-step solutions. Solve the sample questions below, then practice the full set free on the RankByte app.
Lens Formula and MagnificationQuiz - Solve & Score
Q1. Which one of the following materials CANNOT be used to make a lens?
- A.Clay
- B.Glass
- C.Water
- D.Plastic
Answer: A. Clay
Q2. What is cataract?
- A.A condition where the crystalline lens of the eye becomes milky and cloudy.
- B.A condition where the eye loses its power of accommodation.
- C.A condition where the eye becomes blind.
- D.A condition where the eye becomes normal.
Answer: A. A condition where the crystalline lens of the eye becomes milky and cloudy.
NCERT fact (physics, chapter 'Light - Reflection and Refraction'): A condition where the crystalline lens of the eye becomes milky and cloudy. Why option A fits - Sometimes, the crystalline lens of people at old age becomes milky and cloudy. Distractor analysis: option B) 'A condition where the eye loses its power of accommodation.' fails since Presbyopia is a condition where the eye loses its power of accommodation; option C) 'A condition where the eye becomes blind.' doesn't hold - Cataract causes partial or complete loss of vision. Final answer - A) A condition where the crystalline lens of the eye becomes milky and cloudy.
Q3. A student has difficulty reading his textbook (held close) but can clearly read the blackboard from the last row. Which defect of vision does he have?
- A.Hypermetropia (far-sightedness)
- B.Myopia (near-sightedness)
- C.Presbyopia
- D.Astigmatism
Answer: A. Hypermetropia (far-sightedness)
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Where can I practise Lens Formula and Magnification questions for Class 10 Science?
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Are these Lens Formula and Magnification questions important for the exam?
Yes. These Lens Formula and Magnification important questions follow the Science exam pattern (CBSE Boards, plus JEE and NEET foundation), so they help with both school and competitive prep.
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