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Refraction is
  • a)
    Reversal of direction of propagation of light
  • b)
    The change of direction of propagation of light
  • c)
    None of the above
  • d)
    Change of direction of propagation of light at the interface of two media as light passes from one medium to another
Correct answer is option 'D'. Can you explain this answer?
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Refraction isa)Reversal of direction of propagation of lightb)The chan...
Understanding Refraction
Refraction is a fundamental concept in optics that describes how light behaves as it travels through different media.
Definition of Refraction
- Refraction is defined as the change in direction of propagation of light when it passes from one medium to another.
Key Aspects of Refraction
- Medium Transition: When light travels from a medium with one optical density (like air) to another with a different density (like water or glass), it changes speed.
- Direction Change: This change in speed causes the light to change direction.
Correct Answer - Option D
- The correct answer is option 'D': "Change of direction of propagation of light at the interface of two media as light passes from one medium to another." This option accurately captures the essence of refraction, highlighting both the interface and the transition between different media.
Examples of Refraction
- Water and Air: A common example is when a straw placed in a glass of water appears bent at the surface. This bending occurs due to the refraction of light as it moves from water to air.
- Prisms: Light passing through a prism is refracted, resulting in a spectrum of colors. This illustrates how different wavelengths of light can bend at different angles.
Conclusion
Understanding refraction is essential for various applications, including lenses in glasses, cameras, and optical instruments. It plays a crucial role in our perception of the world around us.
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Read the following text and answer the following questions on the basis of the same:Negative Refractive Index: One of the most fundamental phenomena in optics is refraction. When a beam of light crosses the interface between two different materials, its path is altered depending on the difference in the refractive indices of the materials. The greater the difference, the greater the refraction of the beam. For all known naturally occurring materials the refractive index assumes only positive values. But does this have to be the case?In 1967, Soviet physicist Victor Veselago hypothesized that a material with a negative refractive index could exist without violating any of the laws of physics.Veselago predicted that this remarkable material would exhibit a wide variety of new optical phenomena. However, until recently no one had found such a material and Veselago’s ideas had remained untested. Recently, meta-material samples are being tested for negative refractive index. But the experiments show significant losses and this could be an intrinsic property of negativeindex materials.Snell’s law is satisfied for the materials having a negative refractive index, but the direction of the refracted light ray is ‘mirror-imaged’ about the normal to the surface.There will be an interesting difference in image formation if a vessel is filled with “negative water” having refractive index – 1.33 instead of regular water having refractive index 1.33.Say, there is a fish in a vessel filled with negative water. The position of the fish is such that the observer cannot see it due to normal refraction since the refracted ray does not reach to his eye.But due to negative refraction, he will be able to see it since the refracted ray now reaches his eye.Q. A ray incident on normal glass and “negative glass” at an angle 60°. If the magnitude of angle of refraction in normal glass is 45° then, what will be the magnitude of angle of refraction in the “negative glass”?

Read the following text and answer the following questions on the basis of the same:Negative Refractive Index: One of the most fundamental phenomena in optics is refraction. When a beam of light crosses the interface between two different materials, its path is altered depending on the difference in the refractive indices of the materials. The greater the difference, the greater the refraction of the beam. For all known naturally occurring materials the refractive index assumes only positive values. But does this have to be the case?In 1967, Soviet physicist Victor Veselago hypothesized that a material with a negative refractive index could exist without violating any of the laws of physics.Veselago predicted that this remarkable material would exhibit a wide variety of new optical phenomena. However, until recently no one had found such a material and Veselago’s ideas had remained untested. Recently, meta-material samples are being tested for negative refractive index. But the experiments show significant losses and this could be an intrinsic property of negativeindex materials.Snell’s law is satisfied for the materials having a negative refractive index, but the direction of the refracted light ray is ‘mirror-imaged’ about the normal to the surface.There will be an interesting difference in image formation if a vessel is filled with “negative water” having refractive index – 1.33 instead of regular water having refractive index 1.33.Say, there is a fish in a vessel filled with negative water. The position of the fish is such that the observer cannot see it due to normal refraction since the refracted ray does not reach to his eye.But due to negative refraction, he will be able to see it since the refracted ray now reaches his eye.Q. When the angle of incidence will be equal to angle of refraction for material having negative refraction index?

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Refraction isa)Reversal of direction of propagation of lightb)The change of direction of propagation of lightc)None of the aboved)Change of direction of propagation of light at the interface of two media as light passes from one medium to anotherCorrect answer is option 'D'. Can you explain this answer?
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Refraction isa)Reversal of direction of propagation of lightb)The change of direction of propagation of lightc)None of the aboved)Change of direction of propagation of light at the interface of two media as light passes from one medium to anotherCorrect answer is option 'D'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Refraction isa)Reversal of direction of propagation of lightb)The change of direction of propagation of lightc)None of the aboved)Change of direction of propagation of light at the interface of two media as light passes from one medium to anotherCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Refraction isa)Reversal of direction of propagation of lightb)The change of direction of propagation of lightc)None of the aboved)Change of direction of propagation of light at the interface of two media as light passes from one medium to anotherCorrect answer is option 'D'. Can you explain this answer?.
Solutions for Refraction isa)Reversal of direction of propagation of lightb)The change of direction of propagation of lightc)None of the aboved)Change of direction of propagation of light at the interface of two media as light passes from one medium to anotherCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12. Download more important topics, notes, lectures and mock test series for Class 12 Exam by signing up for free.
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