NextMockSearch exams, e.g. SSC CGL, UPPSC, Lekhpal
Railways PYQCBT 2 2017

RRB NTPC · Question 31

Which of the following uses only convex lens?

  1. Car Headlights

  2. Flashlights

  3. Microscope

  4. Peepholes

Show answer & explanation

Answer: (C) Microscope

Explanation

A compound microscope uses two convex lenses (objective and eyepiece). Car headlights and flashlights use concave reflectors, and door peepholes use concave (diverging) lenses.