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Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion : Refractive index has no units.
Reason : The refractive index is a ratio of two similar quantities.
  • a)
    Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
  • b)
    Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
  • c)
    Assertion (A) is true but reason (R) is false.
  • d)
    Assertion (A) is false but reason (R) is true.
  • e)
    Both Assertion and Reason are false.
Correct answer is option 'A'. Can you explain this answer?
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Direction: In the following questions, a statement of assertion (A) i...
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
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Direction: In the following questions, a statement of assertion (A) i...
Assertion : Refractive index has no units.
Reason : The refractive index is a ratio of two similar quantities.

The correct answer is option 'A', which states that both the assertion and reason are true and the reason is the correct explanation of the assertion.

Explanation:

Refractive index is defined as the ratio of the speed of light in a vacuum to the speed of light in a medium. It is a measure of how much light bends when it passes from one medium to another. The refractive index is always greater than or equal to 1.

Assertion: Refractive index has no units.

This assertion is true. Refractive index is a ratio of two similar quantities, the speed of light in a vacuum and the speed of light in a medium. Since both quantities have the same units (m/s), the units cancel out when calculating the ratio. Therefore, the refractive index is a unitless quantity.

Reason: The refractive index is a ratio of two similar quantities.

This reason is also true. The refractive index is calculated by dividing the speed of light in a vacuum by the speed of light in a medium. Since both quantities are measures of the speed of light, they are similar quantities.

Explanation of the reason: The speed of light in a vacuum is a constant and has a value of approximately 3 x 10^8 m/s. The speed of light in a medium is less than the speed of light in a vacuum and depends on the properties of the medium. When calculating the refractive index, the units of the speed of light in a vacuum and the speed of light in a medium cancel out, resulting in a unitless quantity.

Conclusion: The refractive index has no units because it is a ratio of two similar quantities, the speed of light in a vacuum and the speed of light in a medium. Both the assertion and reason are true, and the reason correctly explains the assertion.
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Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Refractive index has no units.Reason : The refractive index is a ratio of two similar quantities.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'A'. Can you explain this answer?
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Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Refractive index has no units.Reason : The refractive index is a ratio of two similar quantities.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'A'. Can you explain this answer? for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Refractive index has no units.Reason : The refractive index is a ratio of two similar quantities.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Refractive index has no units.Reason : The refractive index is a ratio of two similar quantities.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'A'. Can you explain this answer?.
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