CBSE Class 10 Human Eye and the Colourful World — practice questions
29 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 10 Human Eye and the Colourful World in the app →The transparent front layer of the human eye is called the:The image of an object is formed on the:The least distance of distinct vision for a healthy adult human eye is about:Power of accommodation of the eye is the ability of the eye lens to:White light splits into its colours when passed through a prism. This phenomenon is called:The order of the colours of the visible spectrum, starting with the most refracted, is:Which defect of vision is corrected by a concave lens?Which defect of vision is corrected by a convex lens?In the human eye, the size of the pupil is controlled by the:What causes the twinkling of stars on a clear night?Why does the sky appear blue during the day?Why does the sun appear reddish at sunrise and sunset?A near-sighted person can see only objects nearer than:Power of a corrective lens is expressed in dioptres. One dioptre equals:Presbyopia is caused by:Which of the following causes night blindness?A person can read a book at 30 cm but cannot read it at 25 cm. The defect is:A myopic person uses a lens of focal length -1.5 m. The power of this lens is:The splitting of white light by a prism into colours is due to:Why does a hypermetropic eye have its near point farther than 25 cm?A myopic eye can be corrected by:The phenomenon of bending of light caused by gas density variations in the atmosphere is called:Why are danger signals such as stop lights and fire engines coloured red?Two convex lenses of focal lengths 20 cm and 50 cm are placed in contact. The power of the combination is:Which of the following causes the colour of the clear sky to appear blue at noon?The Tyndall effect refers to the:A boy can see distant objects clearly but cannot read his textbook held at 25 cm. He suffers from:Why do planets NOT twinkle though stars do?The bluish colour scattered toward the sides of a sunbeam is described by: