{"id":253306,"date":"2022-09-10T11:02:41","date_gmt":"2022-09-10T05:32:41","guid":{"rendered":"https:\/\/infinitylearn.com\/surge\/question\/a-point-object-is-placed-at-a-distance-of-10-cm-and-its-real-image-is-formed-at-a-distance-of-20-cm-from-a-concave-mirror-if-the-object-is-moved-by-0-1-cm-towards-the-mirror-the-image-will-shift-by\/"},"modified":"2022-09-10T11:02:41","modified_gmt":"2022-09-10T05:32:41","slug":"a-point-object-is-placed-at-a-distance-of-10-cm-and-its-real-image-is-formed-at-a-distance-of-20-cm-from-a-concave-mirror-if-the-object-is-moved-by-0-1-cm-towards-the-mirror-the-image-will-shift-by","status":"publish","type":"questions","link":"https:\/\/infinitylearn.com\/surge\/question\/physics\/a-point-object-is-placed-at-a-distance-of-10-cm-and-its-real\/","title":{"rendered":"A point object is placed at a distance of 10 cm and its real image is formed at a distance of 20 cm from a concave mirror. If the object is moved by 0.1 cm towards the mirror, the image will shift by about"},"content":{"rendered":"","protected":false},"author":1,"template":"","meta":{"_yoast_wpseo_focuskw":"","_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"A point object is placed at a distance of 10 cm and its real image is formed at a distance of 20 cm from a concave mirror. If the object is moved by 0.1 cm towards the mirror, the image will shift by about","custom_permalink":"question\/physics\/a-point-object-is-placed-at-a-distance-of-10-cm-and-its-real\/"},"categories":[],"acf":{"question":"<p>A point object is placed at a distance of 10 cm and its real image is formed at a distance of 20 cm from a concave mirror. If the object is moved by 0.1 cm towards the mirror, the image will shift by about<\/p>","options":[{"option":"<p>0.4 cm away from the mirror<\/p>","correct":true},{"option":"<p>0.4 cm towards the mirror<\/p>","correct":false},{"option":"<p>0.8 cm away from the mirror<\/p>","correct":false},{"option":"<p>0.8 cm towards the mirror<\/p>","correct":false}],"solution":"<p>Mirror formula<\/p><p><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><mfrac><mn>1<\/mn><mi mathvariant=\"normal\">f<\/mi><\/mfrac><mo>=<\/mo><mfrac><mn>1<\/mn><mi mathvariant=\"normal\">v<\/mi><\/mfrac><mo>+<\/mo><mfrac><mn>1<\/mn><mi mathvariant=\"normal\">u<\/mi><\/mfrac><mo>\u21d2<\/mo><mfrac><mn>1<\/mn><mi mathvariant=\"normal\">f<\/mi><\/mfrac><mo>=<\/mo><mfrac><mn>1<\/mn><mrow><mo>-<\/mo><mn>20<\/mn><\/mrow><\/mfrac><mo>+<\/mo><mfrac><mn>1<\/mn><mfenced><mrow><mo>-<\/mo><mn>10<\/mn><\/mrow><\/mfenced><\/mfrac><mo>\u21d2<\/mo><mi mathvariant=\"normal\">f<\/mi><mo>=<\/mo><mfrac><mn>20<\/mn><mn>3<\/mn><\/mfrac><mo>&nbsp;<\/mo><mi>cm<\/mi><mo>.<\/mo><\/math><\/p><p>If object moves towards the mirror by 0.1 cm then u = (10 - 0.1) = 9.9 cm.&nbsp;<\/p><p>Hence again from mirror formula&nbsp;<math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><mfrac><mn>1<\/mn><mrow><mo>-<\/mo><mn>20<\/mn><mo>\/<\/mo><mn>3<\/mn><\/mrow><\/mfrac><mo>=<\/mo><mfrac><mn>1<\/mn><mrow><mi mathvariant=\"normal\">v<\/mi><mo>'<\/mo><\/mrow><\/mfrac><mo>=<\/mo><mfrac><mn>1<\/mn><mrow><mo>-<\/mo><mn>9<\/mn><mo>.<\/mo><mn>9<\/mn><\/mrow><\/mfrac><mo>\u21d2<\/mo><mi mathvariant=\"normal\">v<\/mi><mo>'<\/mo><mo>=<\/mo><mn>20<\/mn><mo>.<\/mo><mn>4<\/mn><mo>&nbsp;<\/mo><mi>cm<\/mi><\/math>.<\/p><p>i.e., image shifts away from the mirror by 0.4 cm.<\/p>","subject":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>A point object is placed at a distance of 10 cm and its real image is formed at a distance of 20 cm from a concave mirror. 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