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Refraction through a lens — Practice Quiz

ICSE · Class 10 · Physics

Try a 4-question quiz on Refraction through a lens for ICSE Class 10 Physics: tap an answer to check it and see why. 42 questions in the full chapter test.

42 questions36 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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Quick Quiz: Refraction through a lens

0/4

Tap an answer to check it instantly. No sign-up needed for these 4.

1

A lens that is thicker in the middle and thinner at the edges is called a:

2

The point through which a ray of light passes without deviation is called the:

3

When an object is placed at infinity in front of a convex lens, the image formed is:

4

The focal length of a convex lens is 20 cm. What is its power?

42 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?

Show answer

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:

Show answer

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 Lens and its types, Focal points, focal length, and image behaviour, Factors affecting focal length and power of a lens, Sign convention, lens formula, and magnification. Study these first, then practise questions on each for the ICSE Class 10 board exam.
How many practice questions are there for Refraction through a lens?
There are 42 questions on Refraction through a lens. Try the 4-question sample quiz on this page first; each answer shows an explanation when you tap it.

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

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