With reference to the various properties of light and the phenomena and applications based on such properties, consider the following pairs:Which of the pairs given above are correctly matched?a)1 and 2 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'D'. Can you explain this answer?

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With reference to the various properties of light and the phenomena and applications based on such properties, consider the following pairs:

Which of the pairs given above are correctly matched?

a)
1 and 2 only
b)
2 and 3 only
c)
1 and 3 only
d)
1, 2 and 3

Correct answer is option 'D'. Can you explain this answer?

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With reference to the various properties of light and the phenomena an...

• When two light waves from different coherent sources meet together, then the distribution of energy due to one wave is disturbed by the other. This modification in the distribution of light energy due to the superposition of two light waves is called 'Interference of light'. The interference of light is a special phenomenon reflecting the wave nature of light.
• When two light waves come close to one another, their effects add together. If the crests, or highest parts of the waves, line up perfectly, then the crest of the combined wave will be the sum of the heights of the two original crests. It is called constructive interference. However, if two waves are not perfectly aligned, then when the crest of one wave comes along, it will be dragged down by the trough of the other wave. The resulting, combined wave will have crests that are shorter than the crests of either original wave, and troughs that are shallower than either of the incoming waves. This is known as destructive interference.
• Most of us observe some type of optical interference almost every day.

One of the best examples of interference is demonstrated by the light reflected from a film of oil floating on water. Another example is the thin film of a soap bubble, which reflects a spectrum of beautiful colors when illuminated by natural or artificial light sources. The dynamic interplay of colors often observed on soap bubbles derives from the simultaneous reflection of light from both the inside and outside surfaces of the bubble. The two surfaces are very close together (separated by only a few micrometers) and light reflected from the inner surface interferes both constructively and destructively with light reflected from the outer surface. The effect is observed because light reflected from the inner surface of the bubble must travel farther than light reflected from the outer surface, and variations in the soap film thickness produce corresponding differences in the distances light waves must travel to reach our eyes.
A hologram is a physical recording of an interference pattern that uses diffraction to reproduce a three-dimensional light field, resulting in an image that retains the depth, parallax, and other properties of the original scene. Holography is the science and practice of making holograms. Holography is based on the principle of interference. A hologram captures the interference pattern between two or more beams of coherent light (i.e. laser light). One beam is shone directly on the recording medium and acts as a reference to the light scattered from the illuminated scene. The hologram captures light as it interests the whole area of the film, hence being described as a ‘window with memory’. By contrast, a photograph captures a single small area ‘aperture’ of perspective, the photographic image is created by focusing this light onto film or a digital sensor.

• Upon passage through the prism, the white light is separated into its component colors - red, orange, yellow, green, blue and violet. The separation of visible light into its different colors is known as dispersion. Interference is not involved in this phenomenon.
• Mirage is a type of optical illusion. The following example illustrates it. A traveler has lost his way in the desert. Enduring thirst and hunger, he suddenly saw an oasis, so the overjoyed man quickly ran towards it. To his great disappointment, it was just an illusion produced by a mirage. Such an episode was often pictured in movies, yet the optical magic that the nature plays with us - mirage - really exists in reality. Its formation is a result of the refraction and the total internal reflection of light in the air.
• Hence all the pairs are correctly matched.

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With reference to the various properties of light and the phenomena and applications based on such properties, consider the following pairs:Which of the pairs given above are correctly matched?a)1 and 2 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'D'. Can you explain this answer?

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With reference to the various properties of light and the phenomena and applications based on such properties, consider the following pairs:Which of the pairs given above are correctly matched?a)1 and 2 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'D'. Can you explain this answer? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about With reference to the various properties of light and the phenomena and applications based on such properties, consider the following pairs:Which of the pairs given above are correctly matched?a)1 and 2 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for With reference to the various properties of light and the phenomena and applications based on such properties, consider the following pairs:Which of the pairs given above are correctly matched?a)1 and 2 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'D'. Can you explain this answer?.

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