10. In which of the following materials is the velocity of light greatest? A. Wa

Question

10. In which of the following materials is the velocity of light greatest? A. Water B. Fused quartz C. Crown glass D. Air 11. Which of the following lenses is a converging lens? A. Double-convex lens B. Plano-concave lens C. Spherical-convex lens D. Convexo-concave lens 12. If you're driving towards the sun late in the afternoon, you can reduce the glare from the road by wearing sunglasses that permit only the passage of light that's A. polarized in a horizontal plane. B. dispersed in a spherical plane. C. dispersed in a vertical plane. D. polarized in a vertical plane. 13. The term angle of deviation is used in reference to A. a lens. B. an analyzer. C. a polarizer. D. a prism. 14. A failure of the red-sensitive nerves in the eye to respond to light properly causes A. farsightedness. B. chromatic aberration. C. astigmatism. D. color blindness. 15. Reflecting telescopes are popular because they're A. more powerful than a refracting telescope. B. more durable than a refracting telescope. C. smaller than a refracting telescope. D. easier to build than a refracting telescope.

Explanation / Answer

10. Velocity V and refractive index (n) are related by

n = c/v

so n and v are inversly related

here n of air has less so does the speed is high

so option is D: air

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11.D. Convexo Concave lens , Both surfaces on this lens makes light to meet at a point after passing through the lens

12. D. Polarised in vertical plane , as this glass is polaroid

13. D. Prism, the most widely used device for devition is Prism

14. B. chromatic abberation

15. A. more powerful than a refracting telescope.

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