Which of the following options represents the correct ascending order of the refractive index of certain substances? (Left to right)
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A rose appears red because
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What is the center of curvature of a spherical mirror?
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A concave lens always forms an image which is
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The reflector of a search light is a
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When white light, which is a mixture of seven colours, passes through a prism, why is it dispersed?
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Consider the following statements.
1. Fibre optics is based on the principle of total internal reflection.
2. In an optical fibre communication system, power consumption is extremely low
3. Optical fibre communications are free from radio frequency interference.
4. In India, Reliance Group of Industries is engaged in the manufacture of the optical fibre.
Which of these statements are correct?
1. Fibre optics is based on the principle of total internal reflection.
2. In an optical fibre communication system, power consumption is extremely low
3. Optical fibre communications are free from radio frequency interference.
4. In India, Reliance Group of Industries is engaged in the manufacture of the optical fibre.
Which of these statements are correct?
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If the lens power of glass is +2 dioptre, its focal length will be
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When an object is on the . . . . . . . . of a convex lens, the image is amplified, virtual, and erect.
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Rainbow formation is due to
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An optically plane surface reflects a beam of light as
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Distant objects can be seen with the help of
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While watching 3D movies in the theater, we have to wear special glasses because:
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Brilliance of diamond is due to
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To remove the defect of long sightedness one uses
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Which of the following statements is true?
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Raman effect' deals with the light rays passing through
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An object is placed on the principal axis of a convex lens of focal length 10 cm. If the distance of the object from the lens is 30 cm. What is the distance of the image formed?
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The optical phenomenon that is primarily responsible for the observation of rainbow on a rainy day is
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When an object is kept between two parallel plane mirrors then what is the number of images formed?
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