Science Practice Quiz 98

Q1.According to the provided text, approximately how many people in the developing world are blind?

A. 4.5 million B. 12 million C. 35 million D. 60 million

Q2.How many people with corneal blindness can be cured through corneal transplantation of donated eyes?

A. 35 million B. 4.5 million C. 60% of 4.5 million D. 12 million

Q3.What percentage of people curable through corneal transplantation are children below the age of 12?

A. 35% B. 45% C. 60% D. 12%

Q4.What type of lenses are often required by a person suffering from both myopia and hypermetropia?

A. Concave lenses B. Convex lenses C. Cylindrical lenses D. Bi-focal lenses

Q5.In a common type of bi-focal lens, what type of lens is present in the upper portion and what is its primary function?

A. Convex lens, for near vision B. Concave lens, for distant vision C. Convex lens, for distant vision D. Concave lens, for near vision

Q6.Which type of lens is found in the lower part of a common bi-focal lens and what purpose does it serve?

A. Concave lens, for distant vision B. Convex lens, for near vision C. Concave lens, for reading small print D. Convex lens, for correcting astigmatism

Q7.Besides contact lenses, what other modern method is mentioned for correcting refractive defects of the eye?

A. Herbal remedies B. Surgical interventions C. Dietary changes D. Acupuncture

Q8.In the refraction of light through a rectangular glass slab, how does the emergent ray relate to the incident ray?

A. It is perpendicular to the incident ray. B. It is parallel to the incident ray but slightly displaced laterally. C. It converges towards the incident ray. D. It diverges away from the incident ray.

Q9.What is the structural composition of a triangular glass prism?

A. Two rectangular bases and three triangular lateral surfaces. B. Two triangular bases and three rectangular lateral surfaces. C. Three triangular bases and two rectangular lateral surfaces. D. Three rectangular bases and two triangular lateral surfaces.

Q10.What is the term for the angle formed between the two lateral faces of a transparent prism?

A. Angle of deviation. B. Angle of incidence. C. Angle of emergence. D. Angle of the prism.

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Science Practice Quiz 98