Start learning →

KCET Optics — practice questions — page 3

Explore 73 free Optics questions in KCET Physics. Open each question or exercise to read its content, reference answers and available explanation.

Practise Optics with Quill →

Optics questions and exercises with answers

Showing questions 61–73 of 73.

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

True or false: optical instruments

Read exercise and reference answers
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.

Open this exercise →

Which instrument does this belong to?

Read exercise and reference answers
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.

Open this exercise →

Two are true, one is not

Read exercise and reference answers
Questions
  1. False statement
    It happens going from air into water
    Statements
    1. Total internal reflection goes denser to rarer
    2. It needs i greater than the critical angle
    3. It happens going from air into water
  2. False statement
    Both mirrors have positive focal length
    Statements
    1. Both mirrors have positive focal length
    2. A convex mirror has positive focal length
    3. A concave mirror has negative focal length
  3. False statement
    1 D equals 1 metre
    Statements
    1. Power is the reciprocal of focal length
    2. 1 D equals 1 metre
    3. The dioptre is the SI unit of power
The false line always reverses a direction or a sign. Source: syllabus Physics Part II, Ch 9 Ray Optics and Optical Instruments.

Open this exercise →

How to practise

  1. Choose a Optics question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

More Physics topics

ElectromagnetismKinetic Theory of GasesMagnetismMagnetism and MatterLaws of MotionPhysics and MeasurementWork and EnergyNewton's Laws of Motion