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Bihar Board Class 10 (BSEB) C10refractionlenses — practice questions

Explore 5 free C10refractionlenses questions in Bihar Board Class 10 (BSEB) Physics. Open each question or exercise to read its content, reference answers and available explanation.

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C10refractionlenses questions and exercises with answers

Showing questions 1–5 of 5.

As per your syllabus, when light enters a DENSER medium from a rarer one (e.g. air to glass), how does it bend?Read the answer and worked solution →As per your syllabus, what is the speed of light in a VACUUM?Read the answer and worked solution →As per your syllabus, what is the refractive index of WATER?Read the answer and worked solution →As per your syllabus, what is the refractive index of DIAMOND — the HIGHEST among the common materials listed?Read the answer and worked solution →As per your syllabus, what is the OPTICAL CENTRE of a lens?Read the answer and worked solution →

Worked practice questions

As per your syllabus, when light enters a DENSER medium from a rarer one (e.g. air to glass), how does it bend?

  1. Reverses direction
  2. Away from the normal
  3. TOWARDS the normal
  4. Stays straight
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Correct answer: C. TOWARDS the normal

As per your syllabus, rarer → denser bends toward normal. Denser → rarer bends away from normal.

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As per your syllabus, what is the speed of light in a VACUUM?

  1. Light has no speed
  2. 3 × 10¹⁰ m/s
  3. 3 × 10⁶ m/s
  4. 3 × 10⁸ m/s
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Correct answer: D. 3 × 10⁸ m/s

As per your syllabus, c = 3 × 10⁸ m/s in vacuum (and marginally less in air).

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As per your syllabus, what is the refractive index of WATER?

  1. 1.52
  2. 2.42
  3. 1.33
  4. 1.00
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Correct answer: C. 1.33

As per your syllabus, water n = 1.33. Crown glass n = 1.52; diamond n = 2.42; air ≈ 1.0003.

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