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BITSAT Optics — practice questions — page 3

Explore 74 free Optics questions in BITSAT Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Optics questions and exercises with answers

Showing questions 61–74 of 74.

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

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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Which instrument does this belong to?

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Items
  1. Item
    m = m₀ × mₑ
    Category
    Compound microscope
  2. Item
    Uses L, the distance between focal points
    Category
    Compound microscope
  3. Item
    Views very small nearby objects
    Category
    Compound microscope
  4. Item
    m = f₀/fₑ
    Category
    Telescope
  5. Item
    Compares angles β and α
    Category
    Telescope
  6. Item
    Views very distant objects
    Category
    Telescope
Categories
  1. Item
    Compound microscope
  2. Item
    Telescope
Microscopes and telescopes use the same parts for different jobs. Source: syllabus Physics Part II, Ch 9 Ray Optics and Optical Instruments.

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