Start learning →

Assertion and reason: instruments

Exercise and reference answers

Questions
  1. Reason
    Its magnifying power is f₀ divided by fₑ.
    Verdict
    Both are true; the reason explains the assertion.
    Assertion
    A telescope needs a long focal length objective for high magnification.
  2. Reason
    It multiplies the objective and eyepiece magnifications together.
    Verdict
    Both are true; the reason explains the assertion.
    Assertion
    A compound microscope out-magnifies a simple one.
  3. Reason
    Dispersion splits white light into its colours.
    Verdict
    Both are true; the reason does not explain the assertion.
    Assertion
    The dioptre is the SI unit of lens power.

Explanation

The last round pairs two true halves that do not explain one another. Source: syllabus Physics Part II, Ch 9 Ray Optics and Optical Instruments.
Continue learning with Quill →

Browse more Bihar Board Class 12 (Science) questions and exercises →