The Human Eye and Colorful World FA - III (PAPER Pen Test)
Section A Multiple choice questions: - 1. When we enter a cinema hall, we cannot see properly for a short time. This is because-a) Pupil does not open b) Pupil does not close c) Adjustment of size of pupil takes some time d) None of these above Ans: (c) 2. The property of persistence of vision is used in- a) Short sightedness b) Long sightedness c) Cinematography d) Colour vision Ans: (c)3. Variable focal length of eye is responsible for- a) Accommodation of eye b) Persistence of vision c) Colour blindness d) Least distance of distinct vision Ans: (a)4. A concave lens of suitable focal length is used for correcting a- a) Myopic eye b) Hypermetropic eye c) Both a and b d) nor a nor b Ans: (a)5. Splitting of white light into seven colours on passing through the glass prism is called-a) Reflection b) Refraction c) Scattering d) Dispersion Ans: (d) Section B 1. A person with a myopia eye cannot see objects beyond a distance of 1.5m. What would be the power of corrective lens? Which type of lens is used? (2) 2. What do you understand by myopia? Write two causes of it? (2) 3. What do you mean by far point and near point of eye? (2) 4. What is presbyopia? State the causes of it and How is it corrected? (3) 5. Explain: (3) 1) Why does sky look blue on a clear day 2) Twinkling of stars. 6. What is Hypermetropia? State two causes of Hypermetropia with help of ray diagrams show i) The eye defect hypermetropia. ii) Correction of Hypermetropic by using a lens. :(5 mks) Read and download 10th Human eyes and Colorful World (Sure shot For CBSE Board Examination) 10th Human eyes and Colorful World (Sure shot Test paper and Sample paperFor CBSE Board Examination)
2 Comments
shubhi
24/12/2012 09:44:55 pm
good questions
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pracha
12/1/2017 11:29:41 pm
nice question
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