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MP Board Class 12 (MPBSE) Ray Optics — practice questions — page 2

Explore 45 free Ray Optics questions in MP Board Class 12 (MPBSE) Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Ray Optics questions and exercises with answers

Showing questions 31–45 of 45.

Assertion and reasonRead the answer and worked solution →Match each instrument to its magnifying powerRead the answer and worked solution →True or false: optical instrumentsRead the answer and worked solution →Which instrument does this belong to?Read the answer and worked solution →Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Tap every statement true of refractionRead the answer and worked solution →Complete the prism relationRead the answer and worked solution →Flip and pair: symbol with meaningRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Reading the laws backRead the answer and worked solution →Order the reasoning: why an optical fibre worksRead the answer and worked solution →True or false: mirrors and lensesRead the answer and worked solution →Assertion and reason: instrumentsRead the answer and worked solution →Which quantity is being described?Read the answer and worked solution →

Worked practice questions

Assertion and reason

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Questions
  1. Reason
    Total internal reflection needs travel from a denser medium to a rarer one.
    Verdict
    Both are true; the reason explains the assertion.
    Assertion
    Light cannot be totally internally reflected going from air into glass.
  2. Reason
    Its coating has a lower refractive index, so light keeps reflecting internally.
    Verdict
    Both are true; the reason explains the assertion.
    Assertion
    An optical fibre carries light around bends.
  3. Reason
    Focal length is roughly half the radius of curvature.
    Verdict
    The assertion is false and the reason is true.
    Assertion
    A concave mirror has a positive focal length.
  4. Reason
    Power is the reciprocal of focal length, and those reciprocals add.
    Verdict
    Both are true; the reason explains the assertion.
    Assertion
    Powers of lenses in contact simply add.
The reason must genuinely explain the assertion. Source: syllabus Physics Part II, Ch 9 Ray Optics and Optical Instruments.

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Match each instrument to its magnifying power

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Matching pairs
  1. Left
    Simple microscope
    Right
    m = 1 + D/f
  2. Left
    Simple microscope, image at infinity
    Right
    m = D/f
  3. Left
    Compound microscope
    Right
    m = mₑ × m₀
  4. Left
    Telescope
    Right
    m = f₀/fₑ
The three magnification formulae the chapter gives. Source: syllabus Physics Part II, Ch 9 Ray Optics and Optical Instruments.

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True or false: optical instruments

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Questions
  1. Statement is true
    Yes
    Statement
    The least distance of distinct vision D is taken as 25 cm.
  2. Statement is true
    Yes
    Statement
    A telescope's magnifying power is f₀ divided by fₑ.
  3. Statement is true
    Yes
    Statement
    A compound microscope multiplies the two magnifications.
  4. Statement is true
    No
    Statement
    A telescope's magnifying power is fₑ divided by f₀.
  5. Statement is true
    Yes
    Statement
    Magnifying power compares the angle subtended by image and object.
The least distance of distinct vision is taken as 25 cm throughout. Source: syllabus Physics Part II, Ch 9 Ray Optics and Optical Instruments.

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More Physics topics

Moving Charges and MagnetismMagnetismRay Optics and Optical InstrumentsElectromagnetismAtomsOpticsRay and Wave OpticsMagnetism & EMI