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Important Questions

Refraction through a lens

ICSE · Class 10 · Physics

Most important questions from Refraction through a lens for ICSE Class 10 Physics board exam 2026. MCQs, short answer, and long answer questions with marks.

44 questions22 flashcards5 concepts

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An illustration showing the different types of convex lenses (equi-convex, plano-convex, concavo-convex) and concave lenses (equi-concave, plano-concave, convexo-concave), highlighting their shapes an
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44 Questions·
multiple choicemultiple correct

Sample Questions

1multiple correct

Which of the following are characteristics of a concave lens? (Select all correct answers)

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Diverging in nature, Negative focal length, Forms only virtual images

A concave lens diverges light rays, has a negative focal length, and always forms virtual, erect, and diminished images regardless of object position.

2multiple choice

A concave lens always forms which type of image?

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Virtual, erect and diminished

A concave lens always forms a virtual, erect, and diminished image regardless of the position of the object. This is because concave lenses diverge light rays.

3multiple correct

Which of the following statements about magnification are correct? (Select all correct answers)

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Magnification = v/u, Negative magnification indicates inverted image, If m > 1, image is enlarged

Magnification m = v/u = height of image/height of object. It is dimensionless. Negative m indicates inverted image, positive m indicates erect image. m > 1 means enlarged image.

4multiple choice

The lens formula is:

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1/f = 1/v - 1/u

The lens formula relates focal length (f), object distance (u), and image distance (v). It is derived from geometry and applies to both convex and concave lenses.

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Frequently Asked Questions

What are the important topics in Refraction through a lens for ICSE Class 10 Physics?
Key topics in Refraction through a lens include Concept Map: Refraction Through Lenses, Refraction Through Lenses — Complete Concept Map, How to Determine Image Nature Using Lens Formula. These are the concepts ICSE Class 10 examiners draw on most — study them first, then practise related questions.
How to score full marks in Refraction through a lens — ICSE Class 10 Physics?
Understand the core concepts first, then work through the 44 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.
How many important questions are there in Refraction through a lens?
There are 44 practice questions available for Refraction through a lens. These cover multiple question types including MCQs, short answer, and long answer questions.

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Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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