1.

A concave mirror of focal length 12 cm is placed at a distance of 60 cm from a wall. How far from the wall an object be placed so that its sharp image formed by the mirror falls on the wall?​

Answer» <html><body><p><strong><a href="https://interviewquestions.tuteehub.com/tag/explanation-455162" style="font-weight:bold;" target="_blank" title="Click to know more about EXPLANATION">EXPLANATION</a>:</strong></p><p><a href="https://interviewquestions.tuteehub.com/tag/given-473447" style="font-weight:bold;" target="_blank" title="Click to know more about GIVEN">GIVEN</a>,</p><p></p><p></p><h3>Focal <a href="https://interviewquestions.tuteehub.com/tag/length-1071524" style="font-weight:bold;" target="_blank" title="Click to know more about LENGTH">LENGTH</a> f=20cm</h3><p></p><p></p><h3>Image distance, v=50cm</h3><p></p><p></p><h3>from mirror formula,</h3><p></p><p></p><h3>f1=v1+u1</h3><p></p><p></p><h3>⇒  −201=−501+u1</h3><p></p><p></p><h3>u1=501−201</h3><p></p><p></p><h3>=50×2020−50</h3><p></p><p></p><h3>=1000−30</h3><p></p><p></p><h3>u=−3100cm</h3><p></p><p></p></body></html>


Discussion

No Comment Found

Related InterviewSolutions