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The lens used to read small letters in a dictionary is 1. convex lens of focal length 50 cm2. concave lens of focal length 50 cm 3. convex lens of focal length 5 cm 4. concave lens of focal length 5cm |
Answer» <html><body><p>Correct <a href="https://interviewquestions.tuteehub.com/tag/option-25810" style="font-weight:bold;" target="_blank" title="Click to know more about OPTION">OPTION</a> is 4. concave lens of focal length 5cmExplanation:A convex lens is also used as a simple microscope. The <a href="https://interviewquestions.tuteehub.com/tag/object-11416" style="font-weight:bold;" target="_blank" title="Click to know more about OBJECT">OBJECT</a> is <a href="https://interviewquestions.tuteehub.com/tag/kept-2146214" style="font-weight:bold;" target="_blank" title="Click to know more about KEPT">KEPT</a> between the focal length and mirror so that a virtual, erect and magnified image is formed. Smaller focal length has more power and is suitable for larger magnification. Hence, convex lens of focal length <a href="https://interviewquestions.tuteehub.com/tag/5-319454" style="font-weight:bold;" target="_blank" title="Click to know more about 5">5</a> cm is preferred.</p></body></html> | |