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ICSE Question Bank

Refraction through a Lens

Appeared in 10 of the 11 available papers.

Examined in
10 of 11 papers

Appears almost every year — treat as core

Typically worth
6.4 marks

Average per paper it appears in · 64 marks in total

Usual form
Short answer

44% of this chapter's 45 questions

Needs a diagram
16%

7 questions carry a figure — practise drawing them

Question-type distribution

  • Short answer20
  • MCQ10
  • Numerical7
  • Diagram5
  • True/False1
  • Reasoning1
  • Identification1

Most frequent topics

Lenses and image formation 28Magnification by a concave lens 2Speed of coloured light 1Concave lens image 1Partial covering of a lens 1Lens formula 1Reading glass 1Concave lens and magnification 1
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Showing 20 of 45 matching questions (64 marks).

20 questions

6(c)

A lens of focal length 20 cm forms an inverted image at a distance 60 cm from the lens.

6(b)

A virtual, diminished image is formed when an object is placed between the optical centre and the principal focus of a lens.

6(c)

An object is placed at a distance 24 cm in front of a convex lens of focal length 8 cm.

2(a)

The power of a lens is –5D.

2(b)

State the position of the object in front of a converging lens if:

6(c)

An object is placed at a distance of 12 cm from a convex lens of focal length 8 cm. Find:

7(a)

A lens forms an upright and diminished image of an object when the object is placed at the focal point of the given lens.

7(b)

A lens produces a virtual image between the object and the lens.