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How far should an object be from the pole of a concave mirror of a focal length 20cm to form a real image whose size is 1/5 th of the image of the object. plz answer fast ​

Answer» <html><body><p>The size of image is 1/5th of that of <a href="https://interviewquestions.tuteehub.com/tag/object-11416" style="font-weight:bold;" target="_blank" title="Click to know more about OBJECT">OBJECT</a>... So, I=5*Of=20cmI/O=v/u5*O/O=v/u5/1=v/uTherefore, v=5uNow, we have to apply the formula1/f=1/v-1/u1/f=1/5u-1/u1/20=1/5u-1/uOn taking LCM...1/20=(1-5)/5u1/20= -4/5u5u= -4*205u=-80u= -80/5 =-16cmTherefore, The object should be kept at <a href="https://interviewquestions.tuteehub.com/tag/u-1435036" style="font-weight:bold;" target="_blank" title="Click to know more about U">U</a> which is <a href="https://interviewquestions.tuteehub.com/tag/16cm-277845" style="font-weight:bold;" target="_blank" title="Click to know more about 16CM">16CM</a>(-ve)Hope it helps... <a href="https://interviewquestions.tuteehub.com/tag/mark-555248" style="font-weight:bold;" target="_blank" title="Click to know more about MARK">MARK</a> it as the brainliest</p></body></html>


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