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.

Sample questions

1. 1.The wavelength of red light is $800 \mathrm{~nm}$. Find its frequency. Speed of light $= 3 \times 10^{8} \mathrm{~m} \mathrm{~s}^{-1}$.
2. 2.Which of the following correctly states the lens formula and explains the meaning of the symbols used?
   • A.1/v + 1/u = 1/f, where v is image distance, u is object distance, and f is focal length.
   • B.1/v - 1/u = 1/f, where v is image distance, u is object distance, and f is focal length.
   • C.v - u = f, where v is image distance, u is object distance, and f is focal length.
   • D.1/v - 1/u = 1/f, where v is object distance, u is image distance, and f is focal length.
3. 3.The velocity of light in air is $3 \times 10^{8} \mathrm{ms}^{-1}$. Calculate the velocity of light in diamond of refractive index 2.5.
4. 4.Which phenomenon of light causes the sky to appear blue?
   • A.Reflection of light
   • B.Refraction of light
   • C.Scattering of light
   • D.Dispersion of light
5. 5.A ray of light travelling in air strikes the surface of water obliquely. What happens to the speed, wavelength, and frequency of light as it enters water, and how does the direction of the ray change?
   • A.Speed decreases, wavelength decreases, frequency remains unchanged, and the ray bends towards the normal.
   • B.Speed increases, wavelength increases, frequency remains unchanged, and the ray bends away from the normal.
   • C.Speed decreases, wavelength remains unchanged, frequency decreases, and the ray does not bend.
   • D.Speed remains unchanged, wavelength decreases, frequency increases, and the ray bends towards the normal.