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Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.


Assertion : In Young’s double slit experiment if wavelength of incident monochromatic light is just doubled, the number of bright fringes on the screen will increase.


Reason : Maximum number of bright fringe on the screen is inversely proportional to the wavelength of light used

  • a)
    If both the Assertion and Reason are incorrect.

  • b)
    If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

  • c)
    If the Assertion is correct but Reason is incorrect.

  • d)
    If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion. 

Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Directions: These questions consist of two statements, each printed as...
Assertion: In Young’s double slit experiment, if the wavelength of incident monochromatic light is doubled, the number of bright fringes on the screen will increase.
Reason: The maximum number of bright fringes on the screen is inversely proportional to the wavelength of light used.

To understand why the correct answer is option 'A', let's break down the Assertion and Reason separately and then see how they relate to each other.

Assertion: In Young’s double slit experiment, if the wavelength of incident monochromatic light is doubled, the number of bright fringes on the screen will increase.

In Young's double-slit experiment, a beam of monochromatic light is passed through two slits, creating an interference pattern on a screen placed behind the slits. The interference pattern consists of alternating bright and dark fringes.

When the wavelength of the incident light is doubled, it means that the light waves are becoming longer. The distance between the bright fringes in the interference pattern is determined by the wavelength of light. A longer wavelength means a larger distance between the fringes.

So, if the wavelength is doubled, the distance between the bright fringes will also double. As a result, the number of bright fringes that can fit on the screen will increase. Therefore, the assertion is correct.

Reason: The maximum number of bright fringes on the screen is inversely proportional to the wavelength of light used.

The reason states that the maximum number of bright fringes on the screen is inversely proportional to the wavelength of light used. In other words, as the wavelength increases, the number of bright fringes decreases.

This reason is correct because the distance between the bright fringes is directly related to the wavelength of light. The formula for calculating the distance between the fringes is given by:

Distance between fringes = (wavelength * distance between slits) / (distance to the screen)

As the wavelength increases, the distance between fringes increases, and therefore, the number of fringes that can fit on the screen decreases. This is because the screen has a limited size, and as the distance between fringes increases, fewer fringes can fit within that limited space.

Therefore, the reason is a correct explanation of the assertion.

Conclusion:

Both the assertion and the reason are correct, and the reason is a correct explanation of the assertion. Hence, the correct answer is option 'A'.
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Community Answer
Directions: These questions consist of two statements, each printed as...
Wavelength is inversely proportional to the number of fringes, hence by doubling the wavelength the number of fringes decreases. Hence Assertion and reason are false.
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Read the following text and answer the following questions on the basis of the same:In one of his experiments on interference, August Jean Fresnel used a biprism to induce interference between two beams. He split a diverging beam of light into two parts by using the biprism to refract them. This resulted in two split beams which acted as if they were from two coherent sources and which therefore interfered with each other.A Fresnel Biprism is a thin double prism placed base to base and have very small refracting angle ( 0.5°). This is equivalent to a single prism with one of its angle nearly 179° and other two of 0.5° each.In Young’s double Slits experiment, a single source is split in two coherent sources. For the Young’s slits experiment, we must approximate that the slits act as point sources. This however is not the case, since the slits have finite width. In this way, it gives rise to unwanted diffraction effects that causes errors.The Fresnel biprism experiment overcomes this problem.A Fresnel biprism is a variation of Young’s Slits experiment. When monochromatic light through a narrow slit falls on biprism that divides it into two components. One of these component is refracted from upper portion of biprism and the other one refracted through lower portion. Two virtual coherent sources formed from the original source. In this case, two virtual coherent sources are point sources and replace slits in Young’s experiment.Q. Which problem of Young’s double slit experiment is overcome by Fresnel biprism?

Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.Assertion : In Young’s double slit experiment if wavelength of incident monochromatic light is just doubled, the number of bright fringes on the screen will increase.Reason : Maximum number of bright fringe on the screen is inversely proportional to the wavelength of light useda)If both the Assertion and Reason are incorrect.b)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.c)If the Assertion is correct but Reason is incorrect.d)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.Correct answer is option 'A'. Can you explain this answer?
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Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.Assertion : In Young’s double slit experiment if wavelength of incident monochromatic light is just doubled, the number of bright fringes on the screen will increase.Reason : Maximum number of bright fringe on the screen is inversely proportional to the wavelength of light useda)If both the Assertion and Reason are incorrect.b)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.c)If the Assertion is correct but Reason is incorrect.d)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.Correct answer is option 'A'. 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 Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.Assertion : In Young’s double slit experiment if wavelength of incident monochromatic light is just doubled, the number of bright fringes on the screen will increase.Reason : Maximum number of bright fringe on the screen is inversely proportional to the wavelength of light useda)If both the Assertion and Reason are incorrect.b)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.c)If the Assertion is correct but Reason is incorrect.d)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.Correct answer is option 'A'. 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 Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.Assertion : In Young’s double slit experiment if wavelength of incident monochromatic light is just doubled, the number of bright fringes on the screen will increase.Reason : Maximum number of bright fringe on the screen is inversely proportional to the wavelength of light useda)If both the Assertion and Reason are incorrect.b)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.c)If the Assertion is correct but Reason is incorrect.d)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.Correct answer is option 'A'. Can you explain this answer?.
Solutions for Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.Assertion : In Young’s double slit experiment if wavelength of incident monochromatic light is just doubled, the number of bright fringes on the screen will increase.Reason : Maximum number of bright fringe on the screen is inversely proportional to the wavelength of light useda)If both the Assertion and Reason are incorrect.b)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.c)If the Assertion is correct but Reason is incorrect.d)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.Correct answer is option 'A'. 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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