CBSE Class 8 light — practice questions
23 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 8 light in the app →According to the first law of reflection, the angle of incidence:The image formed by a plane mirror is:The splitting of white light into its constituent colours when it passes through a prism is called:The part of the human eye that controls the amount of light entering through the pupil is the:The Braille system, used by visually impaired people for reading, was developed by:Why does a smooth, polished surface look like a mirror but a sheet of paper does not — even though BOTH obey tIf you raise your RIGHT hand while looking into a plane mirror, the image appears to raise its:A person stands 1 m in front of a plane mirror. The DISTANCE between the person and their image is:Why do night birds like the owl see well in dim light but day birds like the eagle see well in bright daylightMovies trick the eye into seeing smooth motion by flashing 24 still pictures every second. The reason this worWhen you look into a mirror placed perpendicular to a sunlit floor of water, the wall sometimes shows BANDS ofIn the human eye, the LENS sits BEHIND the pupil and FOCUSES light onto:Two plane mirrors are inclined at 60°. The number of images of a small object placed between them is:A candle is placed exactly between two PARALLEL plane mirrors. How many images of the candle are formed?A ray of light strikes a plane mirror at an angle of incidence of 30° (measured from the normal). The angle beA light ray strikes a plane mirror such that the reflected ray makes a RIGHT ANGLE with the incident ray. The In a kaleidoscope, three plane mirrors are typically arranged in the shape of an equilateral triangle (60° angA boy stands 2 m in front of a plane mirror and then walks 1 m TOWARD the mirror. The DISTANCE between him andIn the human eye, why does the pupil ENLARGE in dim light and CONSTRICT in bright light?Looking directly at the sun (or a powerful laser) is dangerous because:What deficiency in the diet can lead to NIGHT BLINDNESS, where a person cannot see well in dim light?Two mirrors meet at right angles (i.e. inclined at 90°). A ray of light strikes the first mirror at 30° as shoHow does the Braille system represent characters?