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AP Intermediate 2nd Year Ray Optics and Optical Instruments — practice questions — page 4

Explore 96 free Ray Optics and Optical Instruments questions in AP Intermediate 2nd Year Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Ray Optics and Optical Instruments questions and exercises with answers

Showing questions 91–96 of 96.

Three of these are wrong. Find the one that holds.Read the answer and worked solution →Which quantity is being described?Read the answer and worked solution →Tap every example of total internal reflectionRead the answer and worked solution →NEET · Physics · Refraction & LensesRead the answer and worked solution →Match each formula to what it describesRead the answer and worked solution →The mirror equation relates u, v and f asRead the answer and worked solution →

Worked practice questions

Three of these are wrong. Find the one that holds.

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Questions
  1. Question
    Three of these statements about total internal reflection are false.
    Choices
    1. Item
      It needs denser to rarer travel
      Correct
      Yes
    2. Explanation
      The direction is the other way.
      Item
      It happens rarer to denser
    3. Explanation
      It occurs ABOVE the critical angle.
      Item
      It occurs below the critical angle
    4. Explanation
      90° is the REFRACTED angle at the critical angle itself.
      Item
      It needs the angle to be exactly 90°
  2. Question
    Three of these statements about lens power are false.
    Choices
    1. Item
      P equals 1/f with f in metres
      Correct
      Yes
    2. Explanation
      Power is the reciprocal, not the focal length.
      Item
      P equals f
    3. Explanation
      1 D is 1 m⁻¹, an inverse metre.
      Item
      1 D equals 1 metre
    4. Explanation
      Its focal length is negative, so its power is too.
      Item
      A diverging lens has positive power
Each trap is a direction or a sign reversed, which is exactly how marks are lost here. Source: syllabus Physics Part II, Ch 9 Ray Optics and Optical Instruments.

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Which quantity is being described?

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Items
  1. Item
    Critical angle i_c
    Category
    An angle
  2. Item
    Angle of minimum deviation
    Category
    An angle
  3. Item
    Focal length f
    Category
    A distance
  4. Item
    Radius of curvature R
    Category
    A distance
  5. Item
    Measured in dioptres
    Category
    A power
  6. Item
    Adds for lenses in contact
    Category
    A power
Categories
  1. Item
    An angle
  2. Item
    A distance
  3. Item
    A power
Critical angle, focal length and power are all single numbers describing very different things. Source: syllabus Physics Part II, Ch 9 Ray Optics and Optical Instruments.

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Tap every example of total internal reflection

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Questions
  1. Items
    1. Text
      Sparkle of a diamond
      Matches the category
      Yes
    2. Text
      A totally reflecting prism
      Matches the category
      Yes
    3. Text
      A mirage on a hot road
      Matches the category
      Yes
    4. Text
      Light guided along an optical fibre
      Matches the category
      Yes
    5. Text
      A rainbow forming in mist
      Matches the category
      No
    6. Text
      A shadow cast by a wall
      Matches the category
      No
    Category
    An example of TOTAL INTERNAL REFLECTION
Your syllabus's own list: diamond's sparkle, totally reflecting prisms, mirage and optical fibres. Source: syllabus Physics Part II, Ch 9 Ray Optics and Optical Instruments.

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