ICSE Class 10 Light — Mock Test (2027)
Free online mock test for Light (ICSE Class 10 Physics) — 20 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 Light 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.Which of the two prisms, A made of crown glass and B made of flint glass, deviates a ray of light more?
- A.Prism A, because crown glass has a lower refractive index.
- B.Prism B, because flint glass has a higher refractive index.
- C.Prism A, because crown glass causes greater deviation due to its density.
- D.Both prisms deviate light equally since they are made of glass.
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2.What is the value of the refractive index of air with respect to glass if the refractive index of glass with respect to air is 1.5?
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3.What is meant by the deviation produced by a prism, and why is it caused? Additionally, which of the following sets correctly identifies the three factors on which the angle of deviation depends?
- A.The deviation is the bending of light due to reflection at the prism surfaces. It depends on the angle of incidence, the color of the prism, and the size of the prism.
- B.The deviation is the bending of light from its original path due to refraction at the two refracting surfaces. It depends on the angle of incidence, the refractive index of the prism material, and the refracting angle of the prism.
- C.The deviation is the scattering of light inside the prism. It depends on the thickness of the prism, the wavelength of light, and the angle of emergence.
- D.The deviation is the absorption of light by the prism. It depends on the transparency of the prism, the angle of refraction, and the density of the prism material.
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4.Why are dark rooms used in photography equipped with infrared lamps instead of regular light sources?
- A.Infrared lamps expose ordinary photographic film instantly.
- B.Infrared lamps emit visible light that does not affect photographic film.
- C.Infrared lamps do not affect ordinary photographic film but work with specially treated film.
- D.Infrared lamps prevent all types of photographic film from being exposed.
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5.A transparent object ... its own colour to pass through and ... all other colours.
- a.allows, absorbs
- b.allows, refracts
- c.absorbs, allows
- d.allows, reflects
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