ICSE Class 10 Ray Optics and Optical Instruments — Mock Test (2027)
Free online mock test for Ray Optics and Optical Instruments (ICSE Class 10 Physics) — 88 competency-based questions based on the latest CISCE 2027 syllabus, with instant marking. Try the samples below, then take the full test free.
What to expect: This mock test covers key concepts from the Ray Optics and Optical Instruments chapter — including application-based and competency-focused questions aligned with how ICSE actually sets the paper.
Tip: Attempt without notes first to identify gaps, then review explanations for any wrong answers. Retake after a few days for best retention.
Sample questions
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1.The power P of a lens of focal length f (in metres) and its SI unit are:
- A.P = f, unit metre
- B.P = 1/f, unit dioptre (D)
- C.P = f^2, unit dioptre
- D.P = 2/f, unit watt
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2.A telescope objective has focal length 144 cm and the eyepiece 6.0 cm. In normal adjustment, the magnifying power and the tube length are:
- A.24 and 150 cm
- B.864 and 150 cm
- C.24 and 138 cm
- D.6 and 144 cm
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3.The critical angle for a pair of media is the angle of incidence for which the angle of refraction is:
- A.0 degrees
- B.45 degrees
- C.90 degrees
- D.180 degrees
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4.For a thin prism of small refracting angle A, the deviation produced is:
- A.d = (n21 - 1)A
- B.d = (n21 + 1)A
- C.d = A/(n21 - 1)
- D.d = n21 A
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5.A ray of light passes from air into glass with an angle of incidence of 60 degrees and an angle of refraction of 30 degrees. The refractive index of the glass is (sin 60 = 0.866, sin 30 = 0.5):
- A.1.33
- B.1.5
- C.1.73
- D.2.0
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